Multiple choice general knowledge

Each square inch of human skin consists of -- feet of blood vessels.

  1. 10

  2. 15

  3. 20

  4. 25

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This is a general knowledge fact about human anatomy. Each square inch of human skin contains approximately 20 feet of blood vessels, including capillaries, veins, and arteries.