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There are about 300 million alveoli in each of your lungs. These tiny air sacs provide an ideal site for the diffusion of gases into and out of the blood - also known as gaseous exchange.
The alveoli have a very large surface area - in fact if all of the alveoli in your lungs were spread out flat
they would cover the area of a tennis court.
This large surface area is the result of all the alveoli being small spheres - it is another example of the
importance of the surface area- to-volume ratio.
If your lungs were simply two large balloon-like structures, the surface area wouldn't be big enough for you to get enough oxygen by diffusion to supply the needs of your cells.
But each alveolus is a very tiny sphere. The smaller the radius of a sphere, the bigger the relative surface area - halving the radius increases the relative surface area by a factor of four.
The millions of tiny alveoli in the human lungs are a very effective adaptation which provides a huge surface area for gaseous exchange into and out of the blood.
The alveoli have a good air supply from the bronchioles and a rich blood supply.
This is vital for successful gaseous exchange because it maintains a steep concentration gradient for oxygen from the air in the alveoli to the blood, and for carbon dioxide from the blood to the alveoli.
What else can I help you with?
What part of the body obsorbs oxyegen form the air?
Alveoli
What is another body part that is called alveolus?
There are alveoli in your lungs and in your mouth.
What body system is the alveoli part of?
Respiratory. They are the air sacs in your lungs.
When gases are exchanged between the alveoli and blood what body systems are involved?
The respiratory and circulatory systems are involved in the exchange of gases between the alveoli and blood. The alveoli are part of the lungs, and their surrounding capillaries are part of the circulatory system.
What do the alveoli in the body do?
alveoli take co2 from
How many alveoli are in a body?
3oo million alveoli
What are the last tubes the air travels through before the alveoli?
what are the 2 pipes air pass through before reaching the alveoli ?
What is alveoli in the body?
air sacs in the lungs
Where does the difussion of gases take plce in the body?
Alveoli.
How does the body exchange carbon dioxide in the blood?
alveoli
What does blood from the body does what?
The oxygen is taken from the alveoli in the lungs.
Where the carbon dioxide and blood exchanged in the body?
Alveoli
