Authors : Kadwe M . D .
Page Nos : 177-179
Description :
In order for the body to stay alive, each of its cells must receive a continuous supply of food
&oxygen. At the same time, carbon dioxide and other materials produced by the cells must be picked up
for removal from the body. This process is continually mai
ntained by the body’s circulator system. The
primary circulatory system consists of the heart and blood vessels, which together maintain a continuous
flow of blood through the body delivering oxygen and nutrients and removing carbon dioxide and waste
produ
cts from peripheral tissues. A subsystem of the circulatory system, the lymphatic system, collects
interstitial fluid and returns it to the blood. The heart pumps oxygen
-
rich blood from the lungs to all
parts of the body through a network of arteries, and
smaller branches called arterioles. Blood returns to
the heart via small venues, which leads to the larger veins. Arterioles and venues are linked even smaller
vessels called met arterioles.
