_Nasal Cavity Structures & Paranasal Sinuses atf.mp4

1 Lateral wall of nasal cavity Kenhub-Lateral wall of the nasal cavity.mp4

The organs of respiratory system open ultimately into the respiratory tract (there is no associated organs like Digestive systems) these organs are:

• Nasal cavity: first part of the respiratory tract.
• Pharynx: for passage of air
• Larynx (second lecture).
• Trachea.
• Bronchi: in each lung, there is 10 bronchopulmonary segments
• Bronchioles.
• Alveoli.

• Bronchioles end in alveoli (a cluster of air sacs) which are the main building unit that performs the lung function.
• we have billions of them in the lungs, they’re responsible for gas exchange, they are surrounded by a very large network of blood capillaries (the largest capillaries in the body) to give a large surface area for gas.
• The lungs are surrounded by pleura and they are two types:

1. Parietal pleura: lines the thoracic cage -to be specific walls of the pleural cavity-

2. Visceral pleura that adheres to the lungs