Across
- 2. The heart pumps this around the body.
- 4. What you do when air goes in and out of your lungs.
- 5. Animals that live on land and in water.
- 10. Young stage of a frog living in water.
- 11. The heart is a strong _____.
- 12. The speed of breathing or heartbeat.
- 13. Cold-blooded animals with scales.
- 15. Animals with six legs and three body parts.
- 17. Where food goes first after you eat.
- 19. The organ that helps you think and remember.
- 20. Organs that help you breathe.
Down
- 1. Animals with feathers and wings.
- 3. Changes an animal goes through as it grows.
- 6. A fully grown animal or person.
- 7. A young frog with legs and a small tail.
- 8. Warm-blooded animals that have babies.
- 9. Gas from the air that moves into your blood.
- 14. Where nutrients are taken from food.
- 16. A very young human.
- 18. Parts of the body that do important jobs.