Human Respiratory Diagram

Hi all,

Please study the human respiratory diagram carefully. Please note how the air sacs are surrounded by the capillary beds.

Just to clarify, the windpipe branches into the lungs as air tubes called bronchi. It is then further branched into smaller air tubes found in air sacs called alveoli. The alveoli are surrounded by capillaries. When the air passes through the alevoli, it will enter the capillaries and will be dissolved in the blood.

Thanks.

Ms Tay