Answers

2015-07-25T17:28:00+05:30

This Is a Certified Answer

×
Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
In  the lungs, the bronchi branch out into smaller tubes known as bronchioles. The air in the bronchiole then pass into million of tiny air sacs called alveoli which are present at the end. In the alveoli diffusion of gases takes place. There is more oxygen present in the alveoli than in the blood of the capillaries. Therefore, the oxygen move from the air to the blood through diffusion. Since there is more carbon dioxide in the blood than in the air, Carbon dioxide diffuses from the blood to the air in the alveoli. It is sent out of the body when the air is exhaled.
1 5 1