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