Question

What is arteriole? What is its function in the body

Answer 1

a small branch of an artery leading into capillaries is called arteriole

The functions of arterioles is to Transport blood from arteries to capillaries.

Answer 2

An arteriole is several types of vessels that transport blood around the body. 

carries blood to an organ and away from the heart.
Arteries deliver oxygen and nutrient to the the body.