Nasal Anatomy (Cartilage, Nasal Cavity, Sinuses, Meatuses, Nasal Mucosa)

Summary

This video script delves into the anatomy of the respiratory system, focusing on the nose. It explains the external and internal structures of the nose, including the nasal bones, cartilages, and the nasal cavity. The script describes the nasal septum, nasal vestibule, and the proper nasal cavity divided into olfactory and respiratory parts. It also covers the sinuses' functions, such as warming and humidifying air, and the importance of the nasal mucosa in filtering, smelling, and defense mechanisms. Conditions like sinusitis and allergies are briefly touched upon.

Takeaways

• 👃 The respiratory system includes the nose, pharynx, larynx, trachea, bronchi, and lungs.
• 👂 The external nose consists of the root (radix nasi), dorsum, apex, and ala nasi.
• 🦴 The nose is composed of bone, cartilage, and fat, including the nasal bones and various cartilages.
• 🔄 The nasal septum is made up of a cartilaginous part and a bony part, providing flexibility.
• 🌿 The nasal cavity is divided into the nasal vestibule and the nasal cavity proper.
• 👃🏼 The nasal cavity proper is further divided into the olfactory part for smell and the respiratory part for breathing.
• 🧠 The olfactory part senses smell due to the first cranial nerve and contains olfactory cells with receptors.
• 🌀 The respiratory part features conchae or turbinates and meatuses, which facilitate sinus drainage.
• 💧 Sinuses help reduce the skull's mass, resonate sound, warm and humidify air, and produce mucus.
• 🚦 The maxillary sinus drains into the middle meatus, while the posterior ethmoidal air cells drain into the superior meatus.
• 🔬 The nasal mucosa has a respiratory epithelium with cilia and goblet cells, and olfactory epithelium with olfactory cells and supporting cells.

Q & A

What are the primary components of the respiratory system?

The primary components of the respiratory system include the Nose, Pharynx, Larynx, Trachea, Bronchi, and Lungs.

What is the function of the nasal anatomy in the respiratory system?

The nasal anatomy is responsible for filtering, warming, and humidifying the air that enters the body, as well as playing a role in the sense of smell.

What are the external structures of the nose?

The external structures of the nose include the Root of the nose (radix nasi), Dorsum of the nose, Apex, and the wings of the nose (ala nasi).

What are the different parts of the nose's cartilage?

The nose's cartilage consists of the Nasal bones, Lateral nasal cartilages, Major alar cartilage, Minor alar cartilage, Accessory nasal cartilages, and the Septal Nasal Cartilage.

What is the role of the nasal septum?

The nasal septum divides the nasal cavity into two parts and consists of a cartilaginous part and a bony part, providing support and flexibility to the nose.

How is the nasal cavity divided?

The nasal cavity is divided into the Nasal Vestibule and the nasal cavity proper, separated by the nasal Limen.

What are the two main parts of the nasal cavity proper?

The nasal cavity proper is divided into the Olfactory Part, responsible for smell, and the Respiratory Part, responsible for breathing.

What are the functions of the Conchae or Turbinates in the nasal cavity?

The Conchae or Turbinates increase the surface area of the nasal cavity, helping to warm and humidify the air, and they also help filter out particles from the air.

What is the significance of the sinuses in the nasal anatomy?

The sinuses help reduce the weight of the skull, contribute to voice resonance, warm and humidify the air, and produce mucus to keep the nasal passages moist.

How do the sinuses connect to the nasal cavity?

The sinuses connect to the nasal cavity through various meatuses; for example, the Sphenoid sinus opens into the Spheno-Etmoidal Recess, and the Maxillary sinus drains into the Middle Meatus.

What is the function of the nasal mucosa?

The nasal mucosa lines the nasal cavity and is responsible for producing mucus, trapping irritants, and playing a role in the sense of smell.

What could potentially block the sinuses?

Conditions such as the common cold, allergies, nasal polyps, or a deviated septum can cause inflammation and swelling, leading to blocked sinuses.