PATHOLOGY

Detailed explanation-1: -Nutrients and waste exchange between the blood and body tissues occurs at the capillary bed. Venules serve as exit vessels in the capillary bed of various organs and unite to form veins, which return the blood to the heart.

Detailed explanation-2: -Capillary exchange refers to the exchange of material from the blood into the tissues in the capillary. There are three mechanisms that facilitate capillary exchange: diffusion, transcytosis and bulk flow. Capillary dynamics are controlled by the four Starling forces.

Detailed explanation-3: -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. Capillaries are semipermeable so that material can be exchanged with surrounding cells.