Multiple choice

What is the main purpose of the circulatory system?

  1. It carries plasma, in which red & white blood cells travel.

  2. It carries red blood cells.

  3. It carries blood and oxygen to cells, and disposes waste.

  4. It allows the muscular system to function.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The primary function of the circulatory system is to transport oxygen, nutrients, and hormones to cells throughout the body, while also carrying away metabolic waste products like carbon dioxide. While it does transport plasma and red blood cells, these are components of the system rather than its overall main purpose.

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