Capillaries with a perforated lining are called
a) perforated capillaries.
b) sinuses.
c) discontinuous capillaries.
d) vasa vasorum.
e) fenestrated capillaries.

The correct answer is E) fenestrated capillaries

Explanation:

Capillaries with perforated linings are called fenestrated capillaries. These capillaries are found in those tissues where molecules are require to be exchanged continuously  between the tissue and the blood like in kidney, endocrine gland and small intestine.

These capillaries plays important role in secretion and absorption because they are more permeable than continuous capillaries and helps in the movement of large molecules across it. These capillaries have diameter between 70-80 nm.  

Fenestrated capillaries which are present in glomerulus of kidney helps in filtration of  waste product from the blood. In intestine these capillaries helps in absorbing the nutrient in the body.  

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