What Are Capillaries?
Reviewed: Dr. Gromatzky
7. Microcirculation
The fluids in the capillaries will pass through the walls of the vessels according to two forces: osmotic pressure and hydrostatic pressure. Fluids outside of the capillaries are drawn back into them through osmotic pressure. This occurs because the fluid in the capillaries is saltier than those outside.
Hydrostatic pressure is what forces fluids out of the capillaries. Hydrostatic pressure means the pressure of the blood flow is caused by the beating of the heart and how elastic the blood vessels are. The pressure is enough to force the blood out through the capillaries and into the rest of the body.
Advertisement
