Question

which blood vessels have the smallest diameter ​

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.

Answer 2

Answer:

smallest diameter vessels—the capillaries

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