Across
- 6. hardens the zonapellucida
- 7. cytoskeletal structure in the tail of the sperm
- 9. process of developing into highly specialized cells
- 13. muscles that connect to skeletons
- 15. red blood cells
- 18. cells on the walls in the alveoli
- 20. filtered liquid
- 23. stem cells that can only become related cell types
- 25. signalling chemical that determinds what genes are expressed
Down
- 1. adaptation where cell curves in on both sides
- 2. muscle involved in involuntary movement
- 3. liquid that stops alveoli walls from sticking together
- 4. male gamete
- 5. stage where stem cells can become any cell except placenta cells
- 8. where adult stem cells can be found
- 10. filitering unit of the kidney
- 11. affects the rate of diffusion
- 12. affects the rate of metabolism
- 14. tip of the sperm cell that houses enzymes
- 16. infolds of the membrane
- 17. little hairs that increases surface area
- 19. female gamete
- 21. outer layer of the egg cell
- 22. when a gene is transcripted and translated into a protein
- 24. oxygen carrying protein the the red blood cell