anatomy and physiology mcqs

Question #168

Histological analysis of a cross section of a blood vessel reveals 5% endothelium, 25% smooth muscle, 45% elastic tissue and 25% connective tissue. This vessel is:

Note the large proportion of elastic tissue. This makes large arteries such as the aorta relatively compliant. This is important in smoothing flow: stretch results in blood being stored during ventricular systole and released during diastole.

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