MICROANATOMY

Detailed explanation-1: -Fluid movement across a capillary wall is determined by a combination of hydrostatic and osmotic pressure. The net result of the capillary microcirculation created by hydrostatic and osmotic pressure is that substances leave the blood at one end of the capillary and return at the other end.

Detailed explanation-2: -The net pressure that drives reabsorption-the movement of fluid from the interstitial fluid back into the capillaries-is called osmotic pressure (sometimes referred to as oncotic pressure). Whereas hydrostatic pressure forces fluid out of the capillary, osmotic pressure draws fluid back in.

Detailed explanation-3: -The two types of forces driving the net filtration pressure, at the glomerulus in the nephron are hydrostatic pressure and blood colloid osmotic pressure.

Detailed explanation-4: -Pressure differentials govern fluid movement across physiologic semi-permeable membranes, and two of these forces are hydrostatic/hydraulic pressure and osmotic pressure.