Wednesday, 7 December 2011

2.66 Circulation

Recall the general plan of the circulation system to include the blood vessels to and from the heart, the liver and the kidneys.

Let's start of with some revision:
When blood comes out of the heart it is an artery. When blood comes in the heart its in an vein. The word for lung in biology is pulmonary. The word for liver is hepatic. The word for kidney is renal.

Description: Blood leaves the right ventricle and enters the lungs through the pulmonary artery, then the blood leaves the lungs and enters the left atrium of the heart through the pulmonary vein. Blood then leaves through the major artery - the aorta - through the left ventricle. The Aorta then branches out to the liver and this smaller blood vessels travels through the liver but is still travelling from the heart which is called the hepatic artery. A branch of the aorta travels to the kidney and since this branch is carries blood to the kidney it's called renal artery. Blood returns to the heart through a blood vessel which is called the vena cava. Blood in the liver travels through the capillary and through a vein called hepatic vein. The vein leaving the kidney is called the renal vein.


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