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