What are 3 major differences between a vein and an artery?

Question

please some diagrams as well

Answer 1

1 major difference is an artery pumps the blood through your body, away from the heart/lungs, while veins bring it back.  Blood in the arteries contain oxygen, while blood in the veins do not.

Answer 2

an artery carries blood from your heart to the rest of your body.

a vein carries that blood back to your heart.

there's more pressure in an artery. if you cut your artery it blood would be gushing out and you'd die of blood loss really quickly. if you cut your vein there would still be a lot of blood but it wouldn't rush out as fast as if you cut your artery

An artery has thick intermediate layers of elastic and muscular fiber, while in the veins, these are less developed.  

Answer 3

Read your biology textbook

Answer 4

The_singing_bookworm,

Basically, the veins  usually have thinner walls and are more flexible. They are often larger than the corresponding artery and some have valves to prevent back-flow of blood. Arteries are elastic vessels that transport oxygenated blood away from the heart. The largest artery of the body is the aorta. The aorta originates from the heart and branches out into smaller arteries. The smallest arteries are called arterioles which branch into capillaries. The artery wall consists of three layers:

The tunica adventitia is the strong outer covering of arteries and veins.

The tunica media. The middle coat (tunica media) is distinguished from the inner by its colour and by the transverse arrangement of its fibres

The tunica intima (or just intima) is the innermost layer of an artery or vein. It is made up of one layer of endothelial cells and is supported by an internal elastic lamina. The endothelial cells are in direct contact with the blood flow.

The construction of veins is similar to that of arteries. However, veins are those vessels leading de-oxygenated blood back towards the heart. They are fed by smaller veins called venules. As a rule, veins have much thinner walls than arteries do, though in cross sectional area they're usually larger than the corresponding artery, because they have to carry the same volume of blood at a lower pressure. Since veins are on the post-capillary side of the circulatory loop, operating at much lower pressures, there's less need for burst resistance. Thin walls are also important because much of the pressure that drives blood through veins is generated not by the heart, but by contraction of the muscles in the region of the vein. This "squeezes" the blood back through the vein. Because they have low pressures, some veins have venous valves in them to prevent back flow. This is especially true of medium sized veins in the extremities, as they have to lift blood against gravity.

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The information provided here should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed physician should be consulted for diagnosis and treatment of any and all medical conditions.

I add a link with details of this subject

http://www.ivy-rose.co.uk/

Topics/Blood_Vessels.htm

Hope this helps

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