Multiple choice

The circulatory system has what parts to it.

  1. the heart

  2. Veins, arteries

  3. capillaries

  4. All four
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The circulatory system consists of the heart, which pumps blood, and blood vessels including arteries, veins, and capillaries, which transport blood throughout the body. Therefore, all of these components are parts of the system.

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