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Since arteries are placed under high-blood pressure situations due to its function as a pumper of blood from the heart to the rest of the body, it must have thick cell walls and a regulated small lumen to maintain this movement of blood. Comparatively, the veins are under low blood pressure and so only require thin walls and an larger lumen to allow easy blood flow. They can generate most of their movement of blood back to the heart via muscle contractions and automatically closing valves.
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∙ 12y ago
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∙ 15y agoThey are narrower in the vein because the blood pressure is lower so the walls do not need to be as thick. =)
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∙ 14y agoSo there is room for blood to flow through. If things get too tight inside the lumen, your blood pressure increases.
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∙ 14y agovines
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∙ 9y agoyes
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∙ 16y agoVeins.
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Difference between artery and vein histologically?
arteries 've short lumen where as veins 've large lumen.
Why do you say that the larger lymph vessels are comparable to veins rather than arteries?
Veins have wider lumens than arteries. Veins have thin muscular walls since low pressured blood passes through veins. the walls of the veins however have the same components as in arteries, that is, they have a muscular wall, a connective tissue wall, an endothelium and a layer of elastic tissue. Since arteries experience higher pressured blood the muscular player is much thicker than the one in the veins. therefore, the lumen of the artery is much smaller than that of the vein. Therefore, since lymphatic materials must pass through lymph vessels having the materials being somewhat large, a wider lumen is needed, like that of the veins.
What do you say that larger lymph vessels are comparable to veins rather than arteries?
Veins have wider lumens than arteries. Veins have thin muscular walls since low pressured blood passes through veins. the walls of the veins however have the same components as in arteries, that is, they have a muscular wall, a connective tissue wall, an endothelium and a layer of elastic tissue. Since arteries experience higher pressured blood the muscular player is much thicker than the one in the veins. therefore, the lumen of the artery is much smaller than that of the vein. Therefore, since lymphatic materials must pass through lymph vessels having the materials being somewhat large, a wider lumen is needed, like that of the veins.
What is the difference between an artery and a vein and what do they do?
Arteries are more elastic but have smaller lumen. They carry blood away from the heart. Veins are less elastic have larger lumen and have valves. They carry blood to the heart.
How many layers has a vein?
veins have many thin layers with circular elastic and muscle fibres and a wide lumen
What is the central opening within a tube or vessel?
lumen - the central opening within a tube or hollow organ.
Why do large veins lie next to bones?
Large veins lie next to bones mostly for protection. Large veins lie next to bones mostly for protection.
Large vein on penis what is it called?
The large veins on the penis are called the dorsal veins of the penis.
What type of veins contain valves?
In the large veins. Because in the large veins the blood must fight the gravity, the blood is flowing up, there are valves in them to prevent the blood to fall down again.
How come smooth muscle fibers of an artery do not get nutrients from lumen?
The Vasa Vasorum supply the wall of the large arteries This method to feed the smooth muscle is necessary as the endothelium covering the lumen doesn't permit the ready diffusion of nutrients from the lumen.
What kinds of veins are there?
There are three types of veins, superficial veins that are just beneath the surface of the skin, deep veins that are large blood vessels found deep inside muscles, and perforator veins that connect the superficial veins to the deep veins.
Which vessel would have a larger lumen an artery or its corresponding vein?
Veins have a much larger lumen compared to arteries, this is for several reasons: Blood in the arteries has left the heart (with exception to the pulmonary artery) much sooner than the blood in veins, therefore it is under much more pressure, so needs more muscle tissue around its walls to a) cope with that pressure and b) to aid the heart in pumping blood. Blood in veins has much lower pressure, meaning it needs less muscle tissue around the walls, leaving much more room for a hollow lumen (which is lined with valves to prevent backflow of blood).
