Alveoli does not collapse because lungs always have a residual volume which prevents the alveoli to collapse.
Collapsing Alveoli
The structure of the lungs, which are surrounded by a lining called the pleura, helps to keep them inflated. The pleural pressure is lower than the pressure inside the alveoli, creating a partial vacuum that prevents the lungs from collapsing. Additionally, the presence of surfactant in the alveoli reduces surface tension, helping to maintain lung expansion.
The fluid in the alveoli of the lungs is called pulmonary surfactant. It helps to reduce surface tension and prevent the alveoli from collapsing, allowing for efficient gas exchange during respiration.
The compound is called surfactant, which is a mixture of lipids and proteins. Surfactant reduces surface tension in the alveoli, preventing them from collapsing and allowing for efficient gas exchange in the lungs.
They produce surfactant, a substance that reduces surface tension. Alveoli are very small, only 80 nanometers wide, and are flat. Therefore they have a tendency to curl up. The surfactant reduces this tendency, hence keeps the alveoli from collapsing.
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Pneumocyte. There are two types: Type I cells make up the lining of the air sacks (alveoli) in the lung, type II cells produce a slick liquid called surfactant that helps coat the alveoli and keep them from collapsing when we exhale.
Type 2 alveoli cells secrete surfactant, which helps to reduce surface tension in the alveoli. This allows for easier expansion of the alveoli during inhalation and prevents them from collapsing during exhalation, promoting efficient gas exchange.
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Surfactants, which are molecules that lower surface tension, can be found in serous fluid. These molecules help prevent alveoli in the lungs from collapsing by reducing the surface tension of the fluid lining the alveoli.
Septal cells, also known as Clara cells, are found in the respiratory bronchioles of the lungs. They produce surfactant, a fluid that helps reduce surface tension in the air sacs (alveoli) of the lungs, preventing them from collapsing. Septal cells also play a role in protecting the airways from foreign particles and toxins.