carry impure blood from organ to heart
Answers
The heart of the human being consists 2 sides right and left.
The right side of the heart receives de-oxygented blood from the lungs which is pumped further and sent to all the parts of the body through blood vessels. And after this the organs sends deoxygenated blood again to lungs and then to heart. This is called double circulation . The energy demand of human is too high and hence it is necessary that for the respiration of oxygenated and de-oxygenated blood to meet this energy demand.
Arteries are the vessels which carry blood from the heart and supply to the organs. The Pulmonary artery carries impure blood from heart to lungs while rest arteries carry pure blood from heart to other organs. Hence arteries may carry pure or impure blood with respect which organ it is supplying.