What are the organs of the circulatory system?

1 Answer
Jun 11, 2018

The main organ is the heart.


The heart constantly pumps blood throughout the body. The blood travels through blood vessels which are organs of the circulatory system.

These are the types of blood vessels:

  • arteries: blood vessels that carry away blood from the heart to the rest of the body

  • arterioles: deliver blood to capillaries; controls how much blood enters the capillaries

  • capillaries: tiny blood vessels that connect arterioles to venules; thin walls that allow nutrients and oxygen to the tissues and absorb carbon dioxide and waste products

  • venules: collect blood from capillaries and drain into veins

  • veins: blood vessels that carry blood back to the heart