Circulatory System

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Across
  1. 3. Exchange of substances takes place in this blood vessel.
  2. 7. The heart can pump 100 ____________ times every day.
  3. 8. The blood moving towards the heart moves ____________ than the blood moving away from the heart to all parts of the body.
  4. 9. The platelets help in blood ____________ so that we do not lose too much blood when we get injured.
Down
  1. 1. The heart has _______ chambers.
  2. 2. This blood vessel usually carries oxygen-poor blood back to the heart.
  3. 4. The _______ transports blood away from the body.
  4. 5. This organ helps to pump blood around the body.
  5. 6. The ______ blood cells carry oxygen to all parts of the body.