GENERAL HISTOLOGY

Detailed explanation-1: -Exchange of Gases, Nutrients, and Waste Between Blood and Tissue Occurs in the Capillaries. Capillaries are tiny vessels that branch out from arterioles to form networks around body cells. In the lungs, capillaries absorb oxygen from inhaled air into the bloodstream and release carbon dioxide for exhalation.

Detailed explanation-2: -Diffusion. Diffusion is the primary mechanism by which small molecules flow across capillaries and into the interstitial fluid, and vice versa, from the interstitial fluid into the capillaries.

Detailed explanation-3: -As blood moves through the capillaries, the oxygen and other nutrients move out into the cells. Then waste matter from the cells goes into the capillaries. As the blood leaves the capillaries, it moves through the veins. Veins merge into larger tubes to carry the blood back to the heart.