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The walls of alveoli are thin to allow the exchange of gases (Co2 and O2) between blood capillaries and the aveoli in the lungs.

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Why do capillaries have such thin walls?

Capillaries have thin walls to optimise the level of diffusion of oxygen and other nutrients in the blood stream to the surrounding cells.


Where does gas exchange occur?

gas exchange occurs between the thin walls of the alveoli and the thin walls of the capillaries


Why are capillaries the site of material exchange between the cells and blood?

The walls of capillaries are very thin allowing the nutrients of cells to diffuse through them. They facilitate the diffusion of nutrients to the body by passing them through their cell walls.


Why capillaries have a single layer of epithelial cells?

it is because for the diffusion of water and oxygen molecules


Which part of the body has thin walls that allow oxygen to pass through?

Capillaries


Which part of the body has thin walls to allow oxygen to pass through?

Capillaries


What blood vessels surround the aveoli?

Capillaries The smallest of the blood vessels: capillaries.


Oxygen passes into the capillaries that surround these sac?

Oxygen passes into the capillaries that surround the alveoli. The thin walls of the capillaries make this diffusion easier.


Why is the surface of aveoli thin?

The thin surface of alveoli allows for efficient gas exchange between the air in the lungs and the blood in the capillaries. This thinness minimizes the distance oxygen and carbon dioxide need to diffuse, ensuring rapid exchange and efficient oxygen uptake by the body.


Oxygen and nutrients pass from the blood to the bodys tissues through the thin walls of the?

Capillaries


What are alveoli surrounded by?

the blood surround Alveoli in order to gas exchange between the Alveoli and red blood cell.


True or false Capillaries have thin walls containing only one layer of cells?

true