Question

Difference Between aorta and vena cava from lower body

Answer 1

Answer:

In summary, aorta contains less collagen than elastin, but vena cava contains almost four times more collagen than elastin. In vena cava, the elastin is longitudinally oriented and the collagen becomes more circumferentially oriented and straightens at low levels of strain.

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Answer 2

Aorta carries OXYGENATED BLOOD from heart to the whole body The vena cava are two sets of veins: the superior vena cava, and the inferior vena cava. The inferior vena cava is the longest vein in the body. The superior vena cava mainly (by volume) brings deoxygenated blood from regions of the body above/at the level of the heart & the arms. The vena cava has a thinner wall and a wider lumen than the aorta because of the lower blood pressures it has to deal with. Arterial blood pressure will be higher than venous blood pressure. The force generated by the heart as it pushes blood out requires thick vessel wall so it does not rupture. The vena cava simply carries blood back to the heart, there is much less force/pressure in the vena cava

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