What is the main force that causes fluids to enter the venous end of a capillary?

Question

Quizplus · Accepted Answer

The main force that pulls fluids into the venous end of a capillary is the colloid osmotic pressure in the capillary (blood plasma). This pressure is generated by the presence of proteins in the blood, particularly albumin, which creates an osmotic gradient that draws fluids back into the capillary. The hydrostatic pressure in the capillary and the interstitial fluid, as well as the colloid osmotic pressure in the interstitial fluid, may also play a role, but the colloid osmotic pressure in the capillary is the dominant force.

What Is the Main Force That Causes Fluids to Enter