Want this question answered?
cappillaries
Capillary
Capillaries.
it has three kinds of blood vessels because they each have a special job and it helps your body.
The walls of blood vessels have smooth muscle, which allow contraction and dilation (for example, in response to temperature changes.
In hot weather - blood vessels dilate (widen) - to allow the exchange of heat between the blood and sweat glands. The sweat evaporates - cooling the blood.
capillaries
Capillaries are known as exchange vessels. Capillaries are the smallest of vessels and allow nutrients and waste to pass through blood and body.
respiration, blood vessels allow for oxygen carrying, cilia allow for filter feeding.
Capillaries via osmosis
capillaries
Capillaries are the smallest blood vessels, and they allow for gas exchange in the tissues.