RESPIRATION IN HUMANS

In our body the air we inhale is taken through the nostrils. There are fine hairs in our nostrils, which filters the air passing through it. 

Then the air passes through pharynx and larynx and goes into the lungs. In the lungs, the air passes into smaller and smaller tubes called Bronchi and Bronchioles.

Then it finally reaches to a balloon-like structure called alveoli. In alveoli , exchange of gases takes place.

The walls of alveoli contains a network of blood vessels. 

The carbon-dioxide in our body is taken by blood and it releases into the alveoli and then goes out of the body through nostrils. 

And the oxygenated air reached to alveoli is taken up by blood and transported to all the cells in the body. 

If you want to know about Aerobic and Anaerobic respiration then go to the link given below. Aerobic and Anaerobic respiration 

And to know about Nutrition in humans go to this link 

NUTRITION in HUMANS

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