Question

describe the process of exchange of gases in tissues

Answer 1

In the lungs, oxygen and carbon dioxide (a waste product of bodyprocesses) are exchanged in the tiny air sacs (alveoli) at the end of the bronchial tubes. The alveoli are surrounded by capillaries. ... At the same time, carbon dioxide moves from the bloodstream to the capillaries and into the alveoli.

Answer 2

Tissue get oxygen throug heamoglobin of blood where it received from alveoli..then oxygen get dissolved in cells ,because of low oxygen concentration in them.the cells utilise oxygen to break down food as energy and produces co2 as byproduct..then this co2 Is again carried back to alveoli through blood.the co2 get dissolved in alveoli because of low concentration of co2 in them.alveoli send co2 back to lungs .from there we exhale and get rid of it.this process will be vice versa