The main purpose of this is to get oxygen into the cells of the body where it can be used in the process of respiration to generate energy from glucose. Other chemicals such as nicotine can also easily pass through the thin walls of these air sacs (aveoli) as can viruses and microorganisms. Hope that helps Diesel 'Danger' Nutkins
An alveolus is a single air-sac, and alveoli are multiple air-sacs.
capillaries
the answer to this question is no because the experience of life with hair works but not with other materials such as a plant it will not work so that is your answer NO.
Alveolar sacs is the structural unit of lungs.Tiny blood capillaries fuse together to make up an alveolar sac.This structure of the sac is very important for the easy diffusion of respiratory gases across the membrane.
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There are millions of air sacs in each of your lungs. Each air sac is made up of tiny hollow bubbles called alveoli, and so there is a very big surface for gases to get into and out of the blood.The inside of each air sac is moist.The gas dissolves in the moisture, then passes through the air sac wall.This is very much like a frog as they use there skin to absorb moiture and turn them into gases for breathing.
The capillaries are the small blood vessels that surround each alveolus, or air sac.
The air sac must have thin walls so that air passes easily through it.
The air sacs (alveoli) have a very large total surface area and a very good blood supply. There is an exchange of gases between the air sacs and their surrounding capillary blood vessels. Oxygen diffuses from the air sac into the blood. Carbon dioxide diffuses from the blood into the air sac.
Alveoli which are in your lungs
First it passes through the tracea, then the bronchus, then alveoli and then finally the air sac.
It pumps blood into the veins of the animal
Alveoli which are in your lungs
The capillaries are the small blood vessels that surround each alveolus, or air sac.
Pulmonary capillaries
the air sac itself.
Alveoli also known as air sacs.