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What are the main components of a circulatory system?

1. Heart
2. Lungs
3. Veins
4. Arteries
5. Bronchioles
6. Alveoli

  • A

    1, 2 and 5.

  • B
    1, 2 and 3.
  • C

    2, 3 and 6.

  • D
    1, 3 and 4.

The human circulatory system is designed to ensure a supply of nutrients and oxygen and removal of waste products by transporting them in a steady flow of blood through the entire body. It consists of the heart and different types of blood vessels. These blood vessels have different properties depending on their function in the body.

The parts of your circulatory system are your:

  • Heart, a muscular organ that pumps blood throughout your body.
  • Blood vessels, which include your arteries, veins and capillaries.
  • Blood, made up of red and white blood cells, plasma and platelets.

Note: The lungs, bronchioles and Alveoli are part of the respiratory system.

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