Across
- 1. pumps your blood
- 3. number of chambers in your heart
- 5. brain sends messages through the ___ nervous system
- 6. used to cool our skin
- 9. largest organ in the body
- 10. another name for the large intestine
- 13. approximately how many bones muscles in your body
- 14. largest organ in the nervous system
- 16. take blood away from your heart
- 18. number of chambers in your heart
- 19. approximately how many bones in your body
- 20. the muscles that bends a joint
- 21. tube in the digestive system
- 23. central nervous system consists of brain and ___
- 26. anchor bones to muscles
- 27. tube in your respiratory system
- 29. spinal cord and brain are protected by this
- 30. this lung is bigger
- 32. valve in our body that opens to let food enter our intestines
Down
- 1. ___ have the largest brain of all animals
- 2. where blood cells are produced
- 4. pigment in our skin
- 7. tube in your respiratory system
- 8. number of bones in your spine
- 11. food plus ___ makes energy
- 12. for every thousand red blood cells you have __ white blood cells
- 13. nerve that makes your heart pump
- 15. chemical your body makes from the food you eat
- 17. lining in the stomach to protect it from acid
- 22. largest organ in the human body
- 24. heart is a muscle and a __
- 25. branch on a neuron
- 28. tiny passages in our lungs
- 29. move bones
- 31. first thing to break down food
- 33. stuff we make in our stomachs that our body digests