IMMUNOLOGY

Detailed explanation-1: -The site of exchange of materials between blood and the surrounding cells is capillaries. Blood capillaries are the smallest vessels and are only one cell thick. Hence, exchange of materials can easily occur by diffusion across the membranes of blood capillaries.

Detailed explanation-2: -Capillaries allow the exchange of gasses, nutrients, hormones, and other molecules in the blood. These materials are exchanged with the cells of the body. Carbon dioxide and waste are transferred from the body to the capillaries. Capillaries exchange material with the extracellular fluid.

Detailed explanation-3: -Capillaries, the smallest and most numerous of the blood vessels, form the connection between the vessels that carry blood away from the heart (arteries) and the vessels that return blood to the heart (veins). The primary function of capillaries is the exchange of materials between the blood and tissue cells.

Detailed explanation-4: -The exchange of oxygen, nutrients, and waste between your blood and tissues also happens in your capillaries.

Detailed explanation-5: -Capillaries are the blood vessels that reach out to small cells and tissue, helping in the exchange of materials like oxygen, carbon dioxide, and waste.