Across
- 5. produces blood cells
- 9. excretes salt and urea
- 10. move body and substances
- 11. produces gametes
- 12. maintains stable internal conditions
- 17. transports blood cells and oxygen
- 19. cells are made up of molecules
- 20. similar types of cells
Down
- 1. slow-acting control system
- 2. study of the structure and shape of the body
- 3. gas exchange
- 4. study of how the body and its parts work
- 6. cleanses the body from foreign materials
- 7. fast-acting control system
- 8. atoms combine to form molecules
- 13. different organs working together
- 14. flushes waste from the body in urine
- 15. break down food
- 16. different types of tissues together
- 18. many organ systems working together