arteriole

Question 1

Although the speed of blood flow in an arteriole is greater than speed of blood flow in a capillary, blood does not accumulate in the arterioles.

Explain why.

Answer 1

Many / more capillaries (than arterioles);

2. (Cross-sectional) area of capillaries (much) greater (than of arterioles).

Question 2

An arteriole is described as an organ. Explain why.

Answer 2

Made of (different) tissues / more than one tissue