❤️ Define Alveoli......?
Answers
Alveoli are the small sac like structures present at the terminating end of bronchioles of lungs.
They are the structural and functional unit of lungs. There are millions of alveoli in lungs which are very thin and irregularly walled.
The function of alveoli is to increase the surface area for the gaseous exchange for respiration. They have thin walled blood capillaries to facilitate the diffusion process.
Answer:
Explanation:
Alveoli - Alveolor ducts is a open into extremely thin-walled, grape-shaped air sacs called alveoli. The trachea divides into two tubes called bronchi. Each bronchus divides and branches out in the form of thinner tubes called bronchioles.
The bronchioles enter the lungs and divide further into finer branches called alveolor ducts. Each alveolus is covered by a web of blood capillaries.