what is the purpose of capillaries?

Answer 1

They are the tiniest blood vessels in your circulatory system. They are where the action takes place. Oxygen and nutrients are passed through the capillaries to your tissues and organs. They're very important.

Answer 2

Capillaries beds are the parts of the circulatory system where gas and nutrient exchange is taken place, and where cell wastes are carried away by the blood. Almost every living cell in the body has some contact to a capillary. These things can move across the super thin capillary wall, by diffusion caused by hydrostatic pressure. Wastes are put into the blood stream to be processed by other organs down the road.

They also play an important part in systemic blood pressure. Shock is potentially fatal, and is caused by the smooth muscles of the capillaries to relax and open up allowing blood to pool in the beds of the lower part of the body. That means venous return drops, meanwhile heart rate increases to compensate for lack of blood to pump. Skin on the upper body appears white and cold from the absence of blood.

Answer 3

The purpose of capalaries is to bring supply of oxygen through tiny spaces to reach peripheral, or further away from the heart and major arteries, tissue/cells. The reason they are so small is to allow for higher concentration graidints between capalaries and tissue to arise (thus the exchange for CO2 and O2 between blood and tissue). So capillaries have 2 Big purposes, Supply oxygen and create a gradiant for the pass of different substances.

Answer 4

They supply oxygen and other nutrients to the surrounding tissues in small areas where veins can't reach.