THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -The hydrostatic pressure is lower (15 mm Hg) and the oncotic or colloidal osmotic pressure is much higher (25 mm Hg) near the venous end of capillaries. The fluid is reabsorbed into the capillaries together with waste products from the tissue fluid because of the pressure differential of 10 mm Hg.

Detailed explanation-2: -At the venous end of the capillaries, the tissue fluid is drawn into the capillaries by osmosis.

Detailed explanation-3: -Roles of Capillaries Substances pass through the capillary wall by diffusion, filtration, and osmosis. Oxygen and carbon dioxide move across the capillary wall by diffusion. Fluid movement across a capillary wall is determined by a combination of hydrostatic and osmotic pressure.