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Hello students, answer to the first question of the case study first.
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Atherosclerosis means the plaque buildup inside the arteries which reduce the blood flow.
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A heart attack may occur if the blood supply is reduced to the heart.
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A damaged heart muscles may not pump as well and it may lead to heart failure.
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So let's say this is the artery so this is in the normal human being or you can say in general.
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So this diameter of the artery is well enough to supply blood but in case of atherosclerosis there is buildup of plaque and which will reduce the diameter of the artery and thus it reduce the blood flow and which may cause the heart failure.
00:52
A stroke may occur if the blood supply is cut off to the brain.
00:56
Severe pain and tissue death may also occur if blood supply is reduced to the arm and legs.
01:02
Answer to the next question.
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Arteries is the one which carry blood away from your heart.
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The outer coat of this artery is thin whereas the middle coat is thick.
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The lumen is small.
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Pure oxygenated blood is passed except pulmonary artery.
01:19
Next is vens.
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Vens carry blood towards the heart.
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The outer coat of the ven is thick and the middle coat is thin.
01:27
Lumen is large in vens.
01:30
Impure deoxygenated blood passed except pulmonary ven.
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Next is capillaries.
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These capillaries link artery to ven.
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These capillaries do not have outer and middle coat.
01:43
Lumen is also small.
01:45
First part of the capillary contains oxygenated blood and last part contains deoxygenated blood.
01:52
This is how artery differs from vens and capillaries in terms of its structure and function as well.
02:01
Answer to the next question is that open circulatory system is common to molluscs and arthropods.
02:10
Open circulatory system pump blood into the hemicoel with the blood diffusing back to the circulatory system between cells whereas closed circulatory system which is found in vertebrates and a few invertebrates...