Circulatory system of man is made up of which muscle
a)smooth
b)cardiac
c)skeletal

In the human body, the circulatory systems are made up of smooth muscle.

Option (a);

EXPLANATION:

The circulatory system of a body helps to transfer nutrients and oxygen from the small intestine and the lungs respectively to the cells of the body.

This reduces the waste content from the human body.

The blood vessels of the circulatory system are made up of smooth muscle tissue.

The smooth muscle cells around the blood vessels help to regulate the blood flow to the different segments of the body.

It helps to change the diameter of the arteries.

When the arteries constrict, it reduces the space for blood to flow increasing the blood pressure.

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.