Question

Reveiwing for my final! Help would be AWESOME! I'll fan you and give you a medal!

Compare arteries and veins to capillaries.

Answer 1

I'm pretty good at anatomy but when it comes to the heart...not so much

Answer 2

Arteries carry oxygenated blood away from the heart and veins carry deoxygenated blood to the heart. The capillaries are small vessels that connect the two together. The exchange of nutrients and oxygen between tissues of the body and the arteries take place at the capillary level. The capillaries also pick up carbon dioxide from the tissues of the body and transfer it to the veins.

There is only one artery that carries deoxygenated blood (other than the umbelical artery in a fetus) and there is only one vein that carries oxygenated blood. They are the pulmonary artery and the pulmonary vein. The pulmonary artery takes deoxygenated blood pumped from the heart to the lungs to be oxygenated . Then the now oxygenated blood returns to the heart via the pulmonary vein to be pumped all through the body again.

There is another difference between veins and arteries. Some veins have valves while arteries do not. The reason behind this is that arteries are under high pressure due to them receiving blood directly from the pumping of the heart. Veins on the other hand are under low pressure because the blood inside is being moved by more blood being forced in. When the blood reaches you lower legs, it needs help to travel up against gravity to return back to the heart. So there are valves that close while the heart is at rest causing the blood to be trapped where it is. When the heart pumps, the valves open so the blood will be forced up.

Answer 3

Please fan and medal!

Answer 4

Thanks!

Answer 5

where did u find this info? @BioEpic

Answer 6

https://answers.yahoo.com/question/index?qid=20090430115103AASeoUt

Answer 7

Thank you!

Answer 8

No Problem!