Circulatory System

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Across
  1. 4. A blood vessel that carries blood back to the heart.
  2. 6. The muscular organ that pumps blood throughout the body.
  3. 8. Tiny blood vessels where oxygen and nutrients are exchanged with tissues.
  4. 10. Cells in the blood that carry oxygen.
Down
  1. 1. Gas carried by blood that is essential for cellular respiration.
  2. 2. The rhythmic throbbing of the arteries caused by the heart beating.
  3. 3. The liquid part of blood that carries cells and nutrients.
  4. 4. One of the lower chambers of the heart that pumps blood out.
  5. 5. A blood vessel that carries blood away from the heart.
  6. 7. The fluid that carries cells and nutrients throughout the body.
  7. 9. A structure in the heart that prevents blood from flowing backward.
  8. 11. The movement of blood through the heart and blood vessels.