Question

Which blood vessels have the smallest diametre...?

Answer 1

The smallest of the arteries eventually branch into arterioles. They, in turn, branch into a extremely large number of the smallest diameter vessels—the capillaries (with an estimated 10 billion in the average human body). Next blood exits the capillaries and begins its return to the heart via the venules mark as brainliest

Answer 2

i think arterioles...

plzz mark it as brainliest if u like it