The Heart

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Across
  1. 3. The heart is made of_____?
  2. 6. This type of blood contains oxygen.
  3. 8. This type of blood vessel has an extremely thin wall, only one cell thick.
  4. 9. There are ______ types of blood vessels, used to carry blood around the body.
  5. 10. These carry blood IN to the heart.
  6. 11. How many chambers are there in the heart?
Down
  1. 1. Rate, The number of times your heart beats in one minute is known as your______
  2. 2. This type of blood does not contain oxygen.
  3. 4. Carries oxygen, nutrients and waste products around the body.
  4. 5. These carry blood AWAY from the heart.
  5. 7. These prevent blood from flowing backwards.