🥇 SISTEMA CIRCULATORIO en 18 Minutos!! (Aparato Cardiovascular). ¡Fácil y Sencillo!

Summary

En este vídeo educativo, Juan José Sánchez nos introduce al sistema cardiovascular, también conocido como el sistema circulatorio. Explica que este sistema está compuesto por el corazón y los vasos sanguíneos, y su función principal es transportar la sangre, nutrientes y oxígeno a través del cuerpo. Detalla la estructura del corazón, incluyendo sus tres capas y cuatro válvulas, y describe los tipos de vasos sanguíneos: arterias, venas y capilares. Finalmente, explica el ciclo de la sangre y cómo se oxigena y se devuelve al corazón para continuar la circulación.

Takeaways

• 😀 El sistema cardiovascular, también conocido como el sistema circulatorio, es esencial para el transporte de sangre a través del cuerpo humano.
• 🏃‍♂️ El corazón es el órgano central del sistema cardiovascular, actuando como el 'motor' que impulsa la circulación sanguínea.
• 🔴 Las arterias son conductos elásticos que transportan sangre de alta oxigenación desde el corazón hacia el resto del cuerpo.
• 🔵 Las venas son menos elásticas y su función es devolver la sangre, generalmente desoxigenada, desde el cuerpo de vuelta al corazón.
• 🌐 Los capilares son las conexiones finas entre las arterias y las venas, donde ocurre el intercambio de nutrientes y desechos con las células del cuerpo.
• 🫀 El corazón está compuesto de cuatro cavidades: dos atrios y dos ventrículos, cada uno con una función específica en la circulación sanguínea.
• 🚫 Las válvulas cardíacas, como la válvula mitral y la válvula tricúspide, aseguran que la sangre fluya en una dirección correcta dentro del corazón.
• 🔄 La sangre desoxigenada llega al corazón a través de las venas cava y se envía a los pulmones a través de la arteria pulmonar para oxigenarse.
• 🔝 La sangre oxigenada regresa del pulmón al corazón a través de las venas pulmonares y es enviada al cuerpo a través de la aorta.
• 🔁 El proceso de la diastole y la sistole son los movimientos de relajación y contracción del corazón que mantienen el flujo sanguíneo continuo.

Q & A

¿Qué es el sistema cardiovascular y cómo se conoce a menudo?

El sistema cardiovascular, también conocido como el sistema circulatorio, es un conjunto de órganos encargados de transportar la sangre a través del cuerpo, con el corazón como su órgano central.

¿Cuáles son las funciones principales del sistema cardiovascular?

El sistema cardiovascular se encarga de transportar nutrientes, oxígeno y eliminar los desechos producidos por los procesos metabólicos celulares, además de llevar estos desechos a órganos como los riñones para su eliminación.

¿Cuáles son los componentes generales del sistema cardiovascular?

Los componentes generales incluyen el corazón, las arterias, las venas y los capilares. El corazón es el órgano central que actúa como bomba, las arterias son los conductos que llevan sangre oxigenada lejos del corazón, las venas devuelven la sangre desoxigenada al corazón y los capilares son donde ocurre el intercambio de sustancias.

¿Qué color se utiliza para representar las arterias en los libros de anatomía y por qué?

Las arterias se representan generalmente en rojo en los libros de anatomía porque llevan sangre rica en oxígeno. Sin embargo, esto es una convención para diferenciarlas de las venas; en realidad, las arterias no son rojas.

¿Qué es la sangre venosa y cómo se diferencia de la sangre arterial?

La sangre venosa es la que regresa al corazón después de haber sido utilizada por los tejidos del cuerpo y generalmente tiene menos oxígeno, lo que le da un color más oscuro. Por el contrario, la sangre arterial es rica en oxígeno y es de un color rojo brillante.

¿Cuál es la función de los capilares en el sistema cardiovascular?

Los capilares son donde ocurre el intercambio de nutrientes, oxígeno y desechos entre la sangre y los tejidos. Tienen paredes muy delgadas y son la conexión entre las arterias y las venas para la circulación de la sangre.

¿Dónde se encuentra el corazón en el cuerpo humano y qué cavidad lo rodea?

El corazón está ubicado en el mediastino mediastinal en el tórax, rodeado por un espacio llamado el mediastino y una membrana blanca llamada pericardio.

¿Cuáles son las tres capas principales del corazón y cuál es su función?

Las tres capas principales del corazón son el endocardio, la capa interna en contacto con la sangre; el miocardio, la capa muscular y más gruesa responsable de la contracción del corazón; y el epicardio, una membrana fina que protege el miocardio.

¿Cuál es la diferencia entre las arterias y las venas en términos de estructura y función?

Las arterias son conductos elásticos que salen del corazón y llevan sangre oxigenada a los tejidos, mientras que las venas son menos elásticas y llevan sangre desoxigenada de los tejidos de vuelta al corazón.

¿Cómo se llaman las dos valvulas atrioventriculares y cuál es su función?

Las dos valvulas atrioventriculares son la valva mitral o bicuspid y la valva tricúspida. Su función es permitir el flujo de sangre de los átrios a los ventrículos y prevenir el retroflujo de sangre cuando los ventrículos se contraen.

¿Qué sangre lleva la arteria pulmonar y por qué es la única arteria que lleva sangre desoxigenada?

La arteria pulmonar lleva sangre desoxigenada del corazón a los pulmones para su oxigenación. Es la única arteria que lleva sangre desoxigenada porque todas las demás arterias llevan sangre oxigenada al resto del cuerpo.

Outlines

00:00

🌟 Introducción al sistema cardiovascular

El vídeo comienza con una introducción al sistema cardiovascular, también conocido como el sistema circulatorio. Se explica que este sistema está compuesto por el corazón y los vasos sanguíneos, y su función principal es transportar la sangre a través del cuerpo. La sangre lleva nutrientes, oxígeno y también elimina los desechos producidos por los procesos metabólicos celulares. Se menciona que el sistema cardiovascular es esencial para la vida, ya que permite que estos componentes vitales lleguen a todas las células del cuerpo y se eliminen los desechos.

05:01

🔍 Componentes del sistema cardiovascular

Se describen los componentes generales del sistema cardiovascular, incluyendo el corazón como el órgano central y los vasos sanguíneos como los conductos que distribuyen la sangre. Se explican los tres tipos de vasos sanguíneos: arterias, que son de color rojo en los libros de anatomía por llevar sangre rica en oxígeno; venas, que son de color azul y llevan sangre con menor oxígeno; y capilares, que son la transición entre arterias y venas y donde ocurre el intercambio de sustancias. Además, se menciona la importancia de los capilares para que la sangre pueda regresar al corazón.

10:01

🫀 Anatomía y función del corazón

Se detalla la anatomía del corazón, localizado en el mediastino del torso y rodeado por el pericardio. Se explican las tres capas del corazón: el endocardio, la capa interna en contacto con la sangre; el miocardio, la capa muscular del corazón; y el epicardio, la capa externa. Además, se describen las cuatro cavidades cardíacas: dos atrios y dos ventrículos, y se mencionan las válvulas que permiten el flujo correcto de la sangre, incluyendo las válvulas atrioventriculares y las semilunares. Se enfatiza la función del corazón como un músculo que contrae para bombear la sangre a través del cuerpo.

15:03

🔁 Ciclo de la circulación sanguínea

Se explica el ciclo de la circulación sanguínea, comenzando en el atrio derecho, pasando por el ventrículo derecho y la arteria pulmonar, y luego a los pulmones para la oxigenación. La sangre oxigenada vuelve al corazón a través de las venas pulmonares y se dirige al atrio izquierdo, luego al ventrículo izquierdo, y finalmente a la aorta para ser distribuida a todo el cuerpo. Se resalta la importancia de los capilares en la distribución y el intercambio de nutrientes y desechos. El vídeo concluye con una llamada a la suscripción al canal y a seguir al presentador en Instagram.

Keywords

💡Sistema cardiovascular

El sistema cardiovascular es el conjunto de órganos encargados de transportar la sangre por todo el cuerpo. En el vídeo, se menciona que incluye el corazón y los vasos sanguíneos, actuando como un sistema de bombeo y tuberías. Es fundamental para proveer nutrientes y oxígeno a las células y eliminar los desechos, como se describe en la función de transporte de la sangre y los componentes del sistema.

💡Circulatorio

Este término se refiere al proceso de circulación de la sangre a través del cuerpo, que es central en el tema del vídeo. Se destaca cómo la sangre se mueve en un ciclo continuo, desde el corazón hacia los órganos y luego de regreso, permitiendo la distribución de nutrientes y oxígeno, así como el transporte de desechos.

💡Corazón

El corazón es descrito como el 'motor' del sistema cardiovascular, localizado en el mediastino del tórax. Es el órgano central que bombea la sangre a través de los vasos sanguíneos. En el vídeo, se explica su anatomía y función, destacando su importancia en el ciclo de bombeo sanguíneo.

💡Vasos sanguíneos

Los vasos sanguíneos son los tubos a través de los cuales fluye la sangre. Se dividen en arterias, venas y capilares, cada uno con una función específica en la circulación sanguínea. En el vídeo, se describe cómo estas estructuras son esenciales para la distribución y el retorno de la sangre.

💡Arterias

Las arterias son los conductos que llevan sangre oxigenada desde el corazón hacia el resto del cuerpo. Se caracterizan por ser muy elásticas y se dibujan en rojo en los libros de anatomía, simbolizando la sangre rica en oxígeno. En el vídeo, se menciona que, a excepción de la arteria pulmonar, todas las arterias transportan sangre oxigenada.

💡Venas

Las venas son los conductos que devuelven la sangre desoxigenada al corazón. Generalmente se representan en azul y son menos elásticas que las arterias. El vídeo destaca que, con excepción de las venas pulmonares, todas las venas llevan sangre desoxigenada.

💡Capilares

Los capilares son los vasos sanguíneos donde ocurre el intercambio de gases y nutrientes entre la sangre y los tejidos. Son muy finos y se encuentran distribuidos por todo el cuerpo. En el vídeo, se explica cómo los capilares son cruciales para la función del sistema cardiovascular, permitiendo que las células reciban oxígeno y nutrientes y eliminen desechos.

💡Sístole

La sístole es el movimiento de contracción del corazón, durante el cual bombea la sangre hacia los vasos sanguíneos. En el vídeo, se describe cómo la sístole es una parte fundamental del ciclo cardíaco, propiciando el flujo sanguíneo en el sistema cardiovascular.

💡Diástole

La diástole es el movimiento de relajación del corazón, que ocurre después de la sístole. Permite que el corazón se llene nuevamente de sangre antes de la siguiente contracción. En el vídeo, se menciona cómo la diástole es esencial para el ciclo cardíaco y, por ende, para la función del sistema cardiovascular.

💡Valvulas cardíacas

Las valvulas cardíacas son estructuras que permiten el flujo unidirectional de la sangre dentro del corazón, evitando la regresión. Existen valvulas atrioventriculares y valvulas semilunares. En el vídeo, se explica cómo estas valvulas, como la válvula mitral y la válvula aórtica, son cruciales para mantener la dirección correcta del flujo sanguíneo.

Highlights

El sistema cardiovascular, también conocido como el sistema circulatorio, es un sistema que transporta sangre a través del cuerpo.

El sistema cardiovascular está compuesto por el corazón y los vasos sanguíneos.

El corazón es el órgano central del sistema cardiovascular, actuando como la bomba del sistema.

Los vasos sanguíneos incluyen arterias, que transportan sangre oxigenada, y venas, que devuelven la sangre desoxigenada al corazón.

Las capilarias son las conexiones entre arterias y venas, donde ocurre el intercambio de nutrientes y desechos.

El corazón está localizado en el mediastino mediano en el torax.

El corazón está rodeado por el pericardio, una membrana que lo protege.

El corazón tiene tres capas: el endocardio, el miocardio y el epicardio.

El corazón es un órgano de cuatro cavidades, con dos atrios y dos ventrículos.

Los atrios reciben sangre de las venas y los ventrículos la bombean a través de las arterias.

Existen cuatro válvulas cardiacas que regulan el flujo de sangre en el corazón.

La valva mitral y la valva tricúspide son las válvulas atrioventriculares.

La valva aórtica y la valva pulmonar son las válvulas semilunares.

Las arterias son conductos elásticos que bombean sangre desde el corazón.

Las venas son menos elásticas y devuelven la sangre al corazón desde el cuerpo.

La sangre desoxigenada se oxigena en los pulmones y luego vuelve al corazón a través de las venas pulmonares.

El ciclo cardíaco incluye la sístole, donde el corazón contrae, y la diástole, donde se relaja.

El sistema circulatorio es un circuito cerrado que permite la circulación continua de la sangre.

Transcripts

hello hello how are you? Welcome to a new anatomical video on this channel

easy anatomy by Juan José Sánchez, today I bring you a brief account about the cardiovascular system,

a system also known as the circulatory type system or sometimes we call the systems

devices, so you can see them with the name of the cardiovascular system or the circulatory system,

then accompany me to learn about this wonderful structure or set of structures of the

human body, in general, what is the cardiovascular system? Well, this cardiovascular system

, which is also called the circulatory system, as I told you, is made up of two words,

cardio and vascular, which means that its components include the heart, hence the word cardio, and

the vascular component refers to the blood vessels that Now we are going to see what they are,

then the cardiovascular system can be defined as the set of organs that are

responsible for transporting blood throughout the body or that have a central organ that

would be the heart, which is the pump, is the engine and a let's say a set of pipes, so to speak,

which are the blood vessels that are responsible for distributing this blood throughout

the entire organism, then it is a cycle, it is responsible for both removing blood from the heart and

returning it. blood from the peripheral organs that have already used it to the heart to repeat the

cycle, in fact it is called the circulatory system because what blood actually does is circulate

in a round way, that's where the word circulation comes from because it really is a system

that You work all day and everything that comes out returns there again, so for what

purpose does the cardiovascular system bring blood to the entire body? Imagine, in

the blood, the components that all the cells of the body need travel, the

nutrients travel, the oxygen also travels very importantly, and apart from that, the waste products

ok, which let's say the cells no longer need or which remain as waste after Their metabolic processes

are also carried to the blood because this blood will pass through the kidneys, for

example, the kidneys will filter these wastes and eliminate them through urine, so

see the importance of this cardiovascular system, What are the general components of the

cardiovascular system? well we are talking about a central component which is the heart, right now we will talk about

more or less what the heart is, its anatomy and its functioning quickly and we will talk about the

blood vessels that its second components, now these blood vessels can be of three types,

right now We are going to elucidate the concept of each one, they can be of the artery type. Ok, arteries are

universally drawn in anatomy books as red. Ok, this is because the blood that

is in the arteries is actually a little brighter red, because it is It is assumed that it is

blood rich in oxygen, that is why they draw it red, but really when we dissect

a corpse that we see, we realize that the arteries themselves are not red,

it is simply a norm that has been universally adapted, it has been adopted. universally, just

to differentiate it from the veins, the second type of blood vessels that we are going to differentiate in

a while, I will give you the concept, are the veins, these veins have blood that is poor

in oxygen, it is really a blood that is not so oxygenated, the blood takes on a darker color,

like the one we see, for example, that they take from our forearm, that is

venous blood because they take it from a vein ok and that is why the veins draw blue, however,

it is It is very difficult to see differences between arteries and veins only with the naked eye when we are

seeing a live person and then the third group of blood vessels are capillaries.

Students always ask me what are capillaries? Are they arteries or are they veins?

Actually, as the concept says, capillaries are not arteries nor are they veins, they are simply

capillaries, it is a structure that is throughout the entire body that has a network shape,

so the capillary is the transition place where the arteries end. and they continue

like veins and through the veins the blood of the heart returns, then see it is

That's why I told you that this circulation circuit is a totally closed circuit, so these

blood capillaries, like the walls of the blood vessels here, are very thin, they are not thick,

it is where the exchange of substances from the blood to the outside can really occur. so

that the cells that are around the capillaries take it up, how to return the non-

nutritive substances already waste from those cells to the blood ok, then you see that the capillaries

can really be said to be half vein and artery for it is just a way for them to understand, but

they are really neither arteries nor veins, they are said to be capillaries, they are throughout the entire

body, the place where the blood returns, if we did not have capillaries the blood would simply go through

the arteries and could not return because there would be no communication between vein and artery,

knowing this very well, we are going to start first by talking to you about the heart and then explained

these blood vessels, the heart is a central organ that is located at the level of the thorax, in

the middle part of the thorax in a cavity or space that we see in blue called the

middle mediastinum, ok, what I put in green around it would be the other two cavities of the thorax because

you know that in the thorax there are three large cavities, the pleural cavities, which are the ones that are in

green, which is where the lungs are and the central space that remains between both lungs is the

mediastinum, in a space, then, the mediastinum in turn has some subdivisions that if you want to

go deeper, I invite you to look for my video of mediastinum, but I want you to know

right now that the heart is specifically in the middle mediastinum, we are going to see that the heart

is always surrounded by a white membrane, as we see it here, which is called the pericardium,

I would have to cut the pericardium, see, you see In order to access the heart, let's see

that I am going to explain it to you, what are the general layers of the heart? On YouTube I

have videos of the heart, in fact in 5 videos of the deep anatomy of the heart and in general,

there are three layers of the heart, the most important is the middle layer, which is the thickest layer,

which is the muscular layer. Remember that the function of the heart is to contract because it is a muscle,

so precisely the muscular layer is going to be the most important, we call it myocardium, it is

the middle layer, it turns out that the heart inside, let's say when it is looking towards the cavity ,

it is covered by a membrane, here I put them more or less in yellow, see here it would be

this, it is the membrane that is in contact with the blood so to speak, this membrane is called

the endocardium, it is the innermost membrane, remember What endo means inside ok, then

we would have the endocardium, the myocardium, which is the muscular part and on the outside of the myocardium

we would have a blue, a very small membrane that is to protect the myocardium on the outside,

that is called the epicardium, these are So the only three layers of the heart, endocardium,

myocardium and epicardium ok, the pericardium as they are called now is a layer that is on the outside,

outside the epicardium included, which is not part of the heart, it simply protects it from the outside, but

not It is part of its layers, it is a protective layer and between the pericardium, which would be a layer that is

here surrounding it externally, and the heart itself there is a space that is the pericardial cavity,

where there is a liquid called pericardial fluid, a liquid that serves as cushioning. so that

when the heart contracts it hits us so hard with the walls of the organs that are

around us, well now we are going to talk about the large cavities of the heart quickly we touch

its valves but first do not go away from the video [Music] it is important that you subscribe to the

channel, below where you see that it says subscribe to the click and you are subscribed to the more than 320

anatomical videos that there are in it, we had been talking about the great anatomy of the heart,

the heart is considered to be a four-chambered organ, in fact they call it

tretracameral in shape, why is this? because it will have two upper cavities ok so to speak

called atria, nowadays the atria are no longer called that, it is the name with which

Most people know it, but the name that is being used now is the name atrium, ok then

we would have a left atrium and an atrium on the right side ok, what are the atria for?

In general, the atria are the chambers that are responsible for receiving blood from the veins.

You see that the right atrium receives blood from the great veins, which are the

superior vena cava and the inferior vena cava, while the left atrium receives blood from four

pulmonary veins which are two left pulmonary veins and these two pulmonary veins empty

at the level of the left atrium, I know that perhaps you are asking why the pulmonary veins

are red and not blue, right now I will explain why they are red but I want you to know that veins always

reach the atria ok, there is no discussion, the other two chambers are the

most inferior chambers, we call them ventricles, we have a ventricle on the right side ok and

we would have a ventricle on the left side, the ventricles communicate with the atria What

is the function of the ventricles? remove blood from the heart through arteries,

see that the right ventricle removes it through the pulmonary artery, which goes to the lung,

do not ask me again why the pulmonary artery is blue, it is the only artery that is

blue, Now I will explain to you why, while the one on the left side, which is

the left ventricle, carries its blood to the aorta artery and that is very important,

the atria receive blood from the veins, the ventricles draw blood from the arteries,

now there are valves that They are responsible for separating or communicating according to the part of the

cardiac cycle where you are, to the cavities of the heart, we are going to have four valves,

they are not going to forget because since they are four chambers they are four valves, we divide these valves

into two groups, we talk about the valves that separate atria from ventricles, as they are

separating atria from ventricles they are called atrioventricular ok and we have two valves

that are responsible for separating the ventricle from the arteries that are called arterial valves

or semilunar valves, so the Atrioventricular valves are two, we see that on the

left side what separates me or communicates, as I say, there are certain parts of the cardiac cycle

where the valve is closed and is separating, but there are times that they open like here and we are going to

see that There it is rather communicating, so the one on the left side is called the mitral

or bicuspid valve, this is what is responsible for separating the left atrium from the left ventricle,

on the right side we would have the tricuspid or tricuspid atrioventricular valve, this

is responsible for separating , look at the right atrium of the right ventricle, see that it is quite different

then the mitral which is on the left side and the tricuspid which is on the right side,

now the other two groups of valves as I told you are the semi-lunar ones, these are responsible

for separating specifically to the ventricles of their corresponding artery, they will not be

forgotten because these semi-lunar valves have the same names as the arteries they communicate,

see for example, the right ventricle, as it communicates with the pulmonary artery, is called the pulmonary valve,

the pulmonary semilunar valve. , while the left ventricle, as it continues with the

aorta, we call the aortic semilunar valve, ok then these would be the four large valves

of the heart, the pulmonary and the aortic, part of the semilunar valves and the tricuspid and bicuspid valves on the

part of the atrioventricular and now we have largely finished the anatomy of the heart,

I am going to explain to you what the arteries are, what the veins are, and then I will explain how

the system works in general quickly, so you can see how easy it is, the arteries are

membranous conduits very elastic, we are going to see that this differentiates it quite a bit from the veins,

which are responsible for removing blood from the heart to the rest of the body. Do you remember that there

was a pulmonary artery that carried blood from the right ventricle to the lungs, that is why It is

called that and an artery aorta that carries blood to the left ventricle from the rest of the body,

then you see that the arteries have to have the condition that they have to leave the ventricle,

That is why the one on the right side, even though it is blue, we call it the pulmonary artery,

because it is coming out of the right ventricle and also because when we see it under the microscope

we see that it has a lot of elastic tissue just like an artery, you will say why they

draw it blue? Remember that it is just a drawing, it is not that it is blue, the drawing in

blue is to explain to you that that particular artery carries deoxygenated blood ok,

then the pulmonary artery is the only artery in the body that carries blood poor in oxygen,

because? because the rest of the arteries, which are the majority, carry oxygenated blood which is why they

have their red color and another particular thing that the arteries have is that since they are

connected to the ventricular cavities, every time the ventricle contracts they make a pulse

in the artery, which are what we feel as a pulse, when we try to see

the patient's pulse in the periphery, with respect to the veins or remember that they draw them in blue but it is not

that they are already blue, they are membranous ducts, they are less elastic than the arteries and are responsible for

returning blood from the rest of the body to the heart ok, or from the capillaries of the heart as you want to

call it, remember that the veins are the vascular structures that reach the atria ok, so

that is why The right atrium receives the superior vena cava and the inferior vena cava and they saw that the

left atrium received the pulmonary veins because it was their job because they were bringing

oxygenated blood, so that there is oxygen in the lung but as they are reaching an atrium it is

called veins. ok, so the only veins that carry oxygenated blood are the pulmonary veins,

which reach the left atrium, the rest of the veins in general carry deoxygenated blood,

they are the only two exceptions, the pulmonary artery and the pulmonary vein, how does

the heart with this we finish, notice that here you are going to understand everything, you are going to realize that this

is what is most worthwhile in fact of the class, of the movements to the heart there are two,

contraction movements called systole and a movement where it It relaxes called diastole, so

how does the heart work and why does it have so many chambers and valves? I explain to you,

we are going to start the cycle, we can start it anywhere but I always like to start it

from the right atrium, notice that the right atrium and the right ventricle are drawn in

blue, that means that the blood from the right heart This is what it is called in general,

it is blood poor in oxygen, it is venous blood, so you see that the

right atrium receives blood only from the vena cava, because remember that the veins always

reach the atria, superior vena cava, vena cava. inferior cava, they reach the right atrium, from the

right atrium they pass to the right ventricle they pass specifically through a valve called

the tricuspid valve, the tricuspid atrioventricular valve, once the blood is in the

right ventricle remember that the function of the ventricle in general or the ventricles is to remove

blood through the arteries, then the blood vessel that leaves the right ventricle

is called the pulmonary artery, the valve that separates the pulmonary artery from the right ventricle

is called the pulmonary semilunar valve, because remember that the Half moons have the name

of the artery, so this pulmonary artery reaches the heart with blood poor in oxygen,

remember that the veins bring that deoxygenated blood, it is not yet oxygenated,

so why is it called an artery? because it is coming out of a ventricle and because it is elastic and

because it will have a pulse because the ventricle contracts only this artery is an

exception, because the blood carried by the pulmonary artery is deoxygenated, once the lungs

oxygenate it, they return it Now the left cavities, let them see that the left cavity is

red because they already handle pure oxygenated blood, so how does it return to the lungs and the heart?

short, as they are next to each other, it returns through the pulmonary veins,

as they are veins, the veins will always reach the atria, do not forget specifically

this pulmonary vein reaches the left atrium, as it is a blood that is rich oxygen

that draws it in red, so that the only vein in the body that carries oxygenated blood is

the pulmonary vein, of the rest they saw that all the veins carry deoxygenated blood, well

once the pulmonary vein, very rich in oxygen, emptied into the left atrium , the

left atrium has no more communications but only with the left ventricle and carries it towards the

left ventricle through a valve that is the mitral atrioventricular valve,

also called bicuspid atrioventricular valve, once the left ventricle receives that blood,

it contracted , takes it to the aorta through the aortic semilunar valve because remember that

the semilunar valves have the names of the arteries that they communicate and through the

aorta that blood goes to the entire body, the entire body receives arterial blood rich in oxygen. ,

the body uses it, here there should be capillaries, since they are everywhere in the body,

there are hundreds of thousands of capillaries and then that blood that no longer has oxygen because

the organs used it is returned through the venous system, it reaches the vena cava,

it reaches the right atrium again, the cycle is repeated, it is a circulation that the blood makes

and that is why the system receives this name, so I hope you understood it, don't forget to subscribe

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