Anatomy of Male Reproductive System | Model
Summary
TLDRThis educational video script delves into the male reproductive system, highlighting key structures like the testes, epididymis, vas deferens, seminal vesicles, and penis. It explains the sperm production in seminiferous tubules, storage in the epididymis, and the journey through the vas deferens to the seminal vesicles. The script also covers the anatomy of the penis, including the sensitive glans penis and the erectile tissues. It details the path of semen through the urethra, the role of the prostate gland, and ends with the muscles controlling ejaculation and defecation, providing a comprehensive overview of male reproductive anatomy.
Takeaways
- 🔬 The testes are the primary male reproductive organs responsible for sperm production and are composed of seminiferous tubules.
- 🌡️ The epididymis is a comma-shaped structure that stores and matures sperm before ejaculation.
- 💧 The pampiniform plexus is a network of blood vessels, including arteries and veins, surrounding the spermatic cord.
- 🚦 The vas deferens is a muscular tube that transports sperm from the epididymis to the ejaculatory ducts.
- 🌊 The seminal vesicles produce seminal fluid, which combines with sperm to form semen.
- 🔗 The vas deferens and seminal vesicles join to form the common ejaculatory duct, which passes through the prostate gland.
- 🍥 The prostate gland contributes to the formation of semen by secreting a fluid that mixes with sperm and seminal fluid.
- 🍏 The bulbourethral glands, or Cowper's glands, secrete mucus that neutralizes the acidity of the urethra and lubricates the urethra during ejaculation.
- 💪 The cremaster muscle is a skeletal muscle that can elevate the testes and is derived from the internal oblique muscle of the abdominal wall.
- 🌌 The urethra is divided into the prostatic, membranous, and spongy (penile) urethra, each serving different functions in the transport of urine and semen.
- 🏋️ The external urethral sphincter is under voluntary control, allowing for conscious regulation of urination and ejaculation.
Q & A
What is the primary function of the seminiferous tubules?
-The primary function of the seminiferous tubules is sperm production.
Where are sperm stored and mature in the male reproductive system?
-Sperm are stored and mature in the epididymis.
What is the role of the pampiniform plexus in the male reproductive system?
-The pampiniform plexus is a network of blood vessels, including arteries and veins, that provide blood supply to the testes.
What does the vas deferens transport?
-The vas deferens transports sperm from the epididymis to the ejaculatory ducts during ejaculation.
What is the function of the seminal vesicles?
-The seminal vesicles produce seminal fluid, which is a component of semen that helps nourish and transport sperm.
How does the spermatic cord relate to the vas deferens?
-The spermatic cord contains the vas deferens, blood vessels, nerve fibers, and lymphatic vessels, and provides support and structure to the male reproductive organs.
What is the purpose of the cremaster muscle?
-The cremaster muscle is a skeletal muscle that elevates the testes, which can help regulate temperature for sperm production.
What is the role of the prostate gland in the male reproductive system?
-The prostate gland contributes additional fluid to the semen, which aids in nourishing and protecting the sperm.
What is the function of the bulbourethral glands?
-The bulbourethral glands produce a small amount of mucus that lubricates the urethra and neutralizes its acidity before ejaculation.
What is the difference between the Corpus spongiosum and Corpus cavernosum?
-The Corpus spongiosum surrounds the urethra and helps keep it open during ejaculation, while the Corpus cavernosum is erectile tissue that expands with blood during an erection, helping to maintain the engorgement of the penis.
How does the trigone relate to the bladder's structure?
-The trigone is a triangular area in the bladder formed by the constriction of the internal urethral sphincter and the ureter orifices, and it is where the ureters enter the bladder.
Outlines
🧬 Male Reproductive System Overview
This paragraph introduces the male reproductive system, focusing on the testes as the primary organ for sperm production. The seminiferous tubules within the testes are highlighted as the site of spermatogenesis. The epididymis is mentioned as the storage and maturation area for sperm before ejaculation. The paragraph also describes the vas deferens, which transports sperm from the epididymis, and its journey through the inguinal canal to the seminal vesicles. The role of the seminal vesicles in producing seminal fluid, a component of semen, is also explained. The common ejaculatory duct, formed by the union of the vas deferens and the seminal vesicles, is noted as it passes through the prostate gland. The penis is described with emphasis on the glans penis, rich in touch receptors and sensitive to tactile stimuli. The spermatic cord, containing the vas deferens, blood vessels, and nerves, is also discussed.
🔍 Internal Anatomy of the Testes
The second paragraph delves into the internal structure of the testes, explaining the seminiferous tubules and their role in sperm production. It details the path sperm takes from the tubules through the tubulus rectus and the rete testis into the epididymis. The epididymis's function in sperm storage and maturation is reiterated. The vas deferens is again mentioned, emphasizing its upward journey through the inguinal canal to meet the seminal vesicles. The formation of the common ejaculatory duct within the prostate gland by the union of the vas deferens and the duct of the seminal vesicles is described. The paragraph also covers the anatomy of the bladder, including the detrusor muscle and the internal urethral sphincter, and introduces the concept of the trigone within the bladder. The pubic symphysis is briefly mentioned as part of the overall pelvic anatomy.
🚨 Urethra and Ejaculatory Pathways
The final paragraph discusses the various sections of the male urethra, including the prostatic, membranous, and spongy (penile) urethra. It explains the role of the bulbourethral glands (Cowper's glands) in producing mucus to neutralize the acidity of the urethra and lubricate the penis. The erectile tissues, Corpus spongiosum and Corpus cavernosum, are described in the context of their function during erections, with the former keeping the urethra open during ejaculation and the latter facilitating penile engorgement. The paragraph also touches on the anatomy of the rectum and anal canal, mentioning the anal sinuses, internal and external anal sphincters, and their roles in controlling defecation.
Mindmap
Keywords
💡Testes
💡Seminiferous tubules
💡Epididymis
💡Pampiniform plexus
💡Vas deferens
💡Seminal vesicles
💡Prostate gland
💡Spermatic cord
💡Cremaster muscle
💡Urethra
💡Erectile tissue
Highlights
Introduction to the male reproductive system
External view of the testes and its components
Function of the seminiferous tubules in sperm production
Role of the epididymis in sperm storage and maturation
Description of the pampiniform plexus and its blood vessels
Explanation of the vas deferens and its path through the inguinal canal
Formation of the common ejaculatory duct by the vas deferens and seminal vesicles
Anatomy of the penis and the sensitive glans penis
Structure and function of the spermatic cord
Role of the cremaster muscle in elevating the testes
Internal structure of the testes and the path of sperm
Connection of the epididymis to the vas deferens
Path of the vas deferens through the prostate gland
Function of the seminal vesicles in producing seminal fluid
Anatomy of the bladder and the detrusor muscle
Description of the internal urethral sphincter and its function
Structure and function of the trigone in the bladder
Path of the common ejaculatory duct and its fusion with the urethra
Anatomy of the urogenital diaphragm and its muscles
Function of the external urethral sphincter and its voluntary control
Description of the different parts of the urethra
Role of the bulbourethral glands in lubrication and neutralization
Function of the erectile tissues in the penis
Anatomy of the rectum and anal canal
Function of the internal and external anal sphincters
Transcripts
all right engineers in this video we're
going to talk about the male
reproductive system all right so let's
go ahead and look at this model here so
if we first look off we're going to look
at the testes now this part right here
is actually going to be the testes we'll
take a look at its internal view in just
a second but for right now this is the
external view of the testes okay it's
consisting of What's called the
seminiferous tubules now the semi nerous
tubules are basically where sperm
production is occurring now on the top
of the testes and kind of going
posterior and backwards we'll see
another view of it in a second is the
epidemis so b b is the epidemis and this
is where the sperm is actually going to
be stored and matur until the
ejaculation response then if you come
over here we're going to have this nice
little like blood vessel connection here
they call this blood vessel connection
they actually call it the pampiniform
plexus it's actually made up of a lot of
different types of blood vessels
arteries and veins and stuff like that
okay now if we move upwards we're going
to hit this structure here called the
vast deference now the vast Defence
actually is going to move upwards and
upwards and upwards and it's going to
move through this little tube here
called the inguinal canal and it moves
up through the inguinal Canal goes
posteriorly and it fuses with this
structure here in the back so I'm going
to turn it just a tad bit here so you
guys can see that view this right here
you can see the actual vast deference
it's going to come over here and it's
actually going to it's going to go into
a dilated part called the ampula of the
vast Defence and then the ampula of the
vast difference is going to fuse with a
small little ejaculatory duct of the
seminal vesicles so this structure right
here is called the seminal vesicles it's
basically producing what's called
seminol fluid okay which is basically
helping to be a component of the
semen then the vast Defence and the
seminal vesicles will join and they'll
form What's called the common
ejaculatory duct which will move through
the process GL and we'll see that in a
second now I'm going to come back into
the anterior view for a second so we can
take a look at this
again so now if you look here we're
going to have the penis here right the
actual the whole penis we have like the
root of it the shaft and then this this
bottom part here the tip this part here
the tip of the penis is called the
glands penis okay very very rich in a
lot of different types of touch
receptors and and uh very very sensitive
to tactile stimuli or touch stimuli okay
so if you guys look here this is going
to be you see this kind of like uh
silverish opaque is like tissue here
it's actually going to be a nice little
connective tissue core they actually
call the spat spermatic cord now what
the spermatic cord consists of is it
consists of the vast efference it's
going to consist of the blood vessels
that testicular blood vessels it's also
going to consist of some connective
tissue wrapping around it and then on
top of that you're going to have that
vast Defence so we had the vast Defence
we're going to have blood vessels we're
going to have a connective tissue sheath
and it's going to be running upwards and
there's also going to be some nerve
fibers and a little bit of lymphatic
vessels in that area too and it's going
to be running upwards surrounded by a
connective tissue sheath called the
spermatic cord now on the spermatic cord
you're going to have another muscle here
you can kind of see it coming down in
bands this is actually a skeletal muscle
it's actually called the creas muscle
it's a muscle that elevates the testes
it's actually arises from What's called
the internal oblique muscle which is an
abdominal wall muscle then again if we
follow it upwards we're going to see the
vast Defence kind of poking out of it so
this right here is going to be the vast
Defence the vast deference is going to
again move posteriorly and it's going to
join with What's called the seminal
vesicles let's turn this around for a
second
here so if you look here you're going to
see again vast Defence the vast Defence
will then join with a nice little plump
uh structure here called the seminal
vesicles and the seminal vesicles
produce seminal fluid that will combine
with the actual vast Defence form the
common ejaculatory duct that will move
through the prostate gland and into the
prostatic urethra and we'll see that in
a second here all right so now I'm going
to come back here anterior and again
just to get a little bit orientation of
anatomy this is going to be the bladder
right here so this is the superior
surface of the bladder okay so another
structure that we're going to look at
here is inside of the testes so if you
look inside here you can actually see
where the seminiferous tubules would be
and again they're going to have these
little tubes called the tubulus rectus
and then the epher duct tooles but what
happens is in the back here you're going
to see C there before it goes into this
kind of like part right here you're
actually going to have a part here which
is going to be called you can see here B
is the epidemis C is called the RIT
tesus these little tubes that actually
push the epher duct tools back into the
put in the sperm from the testes into
the epidemis and then if you have here
here's the epidemis and the epidemis
will actually connect with the vast
Defence and the vast eff will run
upwards and then running with it again
is going to be these blood vessels that
have some nerve fibers lymphatic vessels
and wrapped in connective tissue which
is called the spermatic cord like we saw
which runs upwards gives off that vast
Defence which moves through the inguinal
canal and supplies or combines with the
seminal vesicles to form the common
ejaculatory duct all right guys so now
let's take a look here if you look here
we're kind of looking at like a sagital
section so we're slicing this bad boy
down here I want to take a look here
inside of the testes because we looked
outside of it now I want to look inside
of it so if you look inside of the
testes you see this whole part right
here kind of like this uh this weird
color here
uh this part right here is going to be
the testes okay so that's the testes
that's where the seminiferous tubules
are okay that's where the seminiferous
tubules are that's where the sperm is
being produced now what happens is the
sperm is actually going to travel to
another structure you can kind of see it
here B it kind of like imagine like a
comma like I'm coming like this
downwards so I make like a comma that's
going to be the epidemis so the epidemis
is kind of like a comma shaped structure
what happens is the seminiferous tubules
produce sperm and that sperm is going to
track travel through vessels called like
the tubulus rectus and the RIT tesus and
epher ductules and they'll empty into
this structure here called the
epidemis then what happens is whenever
we want to ejaculate the epidemis will
actually push that sperm into this neck
structure here D and D is called the
vast Defence now the vast Defence we
already said will run upwards and what
happens is it'll run up with these blood
vessels here it'll run up with nerve
fibers lymphatic vessels wrapped in a
connective tissue sheath which we call
the uh spermatic cord then what happens
is it runs upwards right it'll come up
through the inguinal canal and it'll go
backwards and combine with that
structure that we already talked about
called the seminal vesicles and it'll
produce a structure whenever the seminal
vesicle combines with the vast
difference it produces a structure right
here it's really really faint this
little divot right here in the prostate
gland that little divot there is
actually called the common ejaculatory
duct
okay so it's a tiny little divot there
which is called the common ejaculatory
duct and that is the combination of the
vast deference and a duct of the seminal
vesicles that fuse together and run
through the prostate gland as the common
ejaculatory duct then this is your
prostate gland this is actually going to
be the bladder so this is the bladder
right here and actually if you look at
the muscular layers of the bladder is
actually going to be What's called the
det trusser muscle which is a smooth
muscle layer this is going to be the
mucosa of the bladder which is made up
of uh transitional epithelial tissue
which allows for the bladder to stretch
you're also going to have a little
sphincter here a little smooth muscle
sphincter right here called the internal
urethro sphincter and then inside here
you're going to have ruge which is all
these like kind of like this little like
um extensions here of the the
transitional aelio tissue we also have
another structure we'll talk about this
more later but there's actually another
structure here called the trigone it's
hard to see in this view but the trigone
is actually made up of three things one
it's made up of one urer like for
example this would be a gurer from the
right side so it's called A urer orifice
which is just a hole where the urer
empties the urine in and if you would
imagine the left side you can't see
there but the left side there'd be
another uror orifice which is emptying
the urine into the bladder mucosa all
right or the cavity Lumin then you're
going to have the urethra the urethra
and it kind of like the internal urethra
shink through here constricts it and
makes it really tight and forms kind of
like a triangular structure called the
trigone okay so the trigone is made up
of the urer orifices both of them and
the urethra and the intern urethra shter
constricts the urethra to make it look
like a triangle all right cool uh just a
little bit more Anatomy here this is
your pubic SYM this is actually the
pubic symphysis is and now let's keep
coming down here if we keep coming down
here here's the common ejaculatory duct
the common ejaculatory duct will
actually combine with this urethra right
here it'll empty the sperm and the semen
into the urethra right here this urethra
because it's running through the
prostate gland is actually called the
prostatic urethra all right then here's
where it gets a little weird here a
little dicey in here if you can see you
can see the skeletal muscle right here
and it comes all the way over to this
side too this is making up what's called
the urogenital diaphragm so the
urogenital diaphragm is made up of this
muscle that moves all the way across
here there's two muscles that make it up
one is called the Deep transverse penus
and the other one is a really really
important one which is going to be kind
of right in here here it's called the
external urethal schiner why is that
important because the external urethal
schiner is under sematic control so
whenever we have to urinate we actually
have voluntary control over that muscle
so that we don't you know pee in our
pants all right so again that's going to
be the urogenital diaphragm now if you
remember we said that this is the
prostatic urethra this right here is the
urogenital diaphragm once the semen or
the urine flows through this space right
here where the urogenital diaphragm is
this is now called the membranous
urethra so prostatic urethra is the
urethra that's running within the
prostate gland the other urethra within
the Mal is where the urogenital
diaphragm is that's going to be called
the membranous urethra very very small
urethra oo another thing there's a
little gland in here a little gland back
here that squirts a little bit of um
basically kind of like a alkaline mucus
that lubricates the gland's penis and
actually helps to neutralize the acidic
tract of the urethra it's called the
bulbo urethal glands or you can also
call the cowers glands and again they
produce kind of like an alkaline mucus
pre-ejaculation that actually is going
to neutralize the acidic tract of the
actual penal urethra and lubricate the
gland's penis so what it's called the
Calpers gland so we got prostatic
urethra membranous urethra then once we
go past the urogenital diaphragm we
enter into this really really long
urethal all all the way down here which
is called the spongy or penile urethra
okay so spongy or penile urethra is
going from here all the way down here
now there's some erectile tissue they
call it spongy or penile urethra spongy
is because it consists of like a spongy
connective tissue surrounding it and
it's basically called erectile tissue so
there's two types of erectile tissue
this one right here that you're going to
see is like uh all this part here it's
kind of like the darker purple that is
actually going to be called the and you
can see here it's consist What's called
the Corpus spongiosum so the Corpus
spongiosum is actually going to be this
actual darker purple erectile tissue and
what the Corpus spongiosum does is it
actually kind of keeps the urethra open
during the ejaculatory response then if
you look here you're going to have
another type of erectile tissue right
here and then right here all 67
basically all this part here that kind
of like um like a babyish blue color
right there that part right there that's
actually called called the Corpus
cavernosum and the Corpus cavernosum
whenever this guy contracts basically
he'll expand so the erectile tissue is
rich in blood vessels and whenever it's
innervated due to some type of tactile
stimuli or parasympathetic nervous
system it'll cause the actual erectile
tissue to get filled with blood which
will compress the actual veins that are
trying to drain the blood and help to be
able to maintain the engorgement of the
penis during the erectile response okay
so he's helping to be able to uh engorge
the penis with blood and prevent any
blood from actually leaking out of the
penis all right or out of the actual
veins from the penis okay so we got
sponger Peno urethra sweet deal let's do
a couple more structures here and then
we're going to be done if you look in
the posterior aspect here just to get a
little bit more Anatomy here this is
actually going to be the uh you know
your rectum so you're going to have your
rectum here and then the rectum will
lead into What's called the anal Canal
now in the anal Canal you're going to
have these little grooves here called
the anal sinuses not that important but
just thought i' mention it there but
there's two muscles that are really
important this one right here is 85 kind
of like the inner layer here inner layer
here 85 is going to be a specific type
of muscle that's lining the um anal
canal and this is called the internal
anal sphincter okay so 85 is called the
internal anal sphincter it's under
involuntary control so whenever we got
to go poo poo this guy is going to say
uh-uh I ain't doing it if the if the
parasympathetic nervous system activates
me got to to go 84 he's very nice with
us right so 84 he's actually very um
accommodating he's called the external
anal sphincter so whenever you got to go
drop that bomb what happens is this guy
you have voluntary control over him so
whenever you really got to go uh blast
that guy out what happens is this guy
you're going to have voluntary control
over so you can determine if the time is
appropriate to do that if not then he
will con stay constricted but then if it
is time to go to the bathroom and you
have to go restock the lake with brown
trout then this guy is going to go ahead
and if it's under voluntary control you
can go ahead and actually relax this guy
and you'll actually Evacuate the bowels
all right all right so we covered a
decent amount of structures here for the
male reproductive system I hope it all
made sense I hope you guys did enjoy it
if you guys did please hit the like
button comment down in the comment
section and please subscribe as always
ninja NS until next time
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