Across
- 7. white blood cell that secrete enzymes to kill bacteria
- 12. cilia waft using a power stroke followed by ___ stroke
- 14. cells with more or less organelles to do a certain function
- 16. offers the egg cell protection
- 18. cells found in the lining of tracts
- 20. shape increases the surface area for exchange
- 21. type of stem cell we have created to use in research and medicine
Down
- 1. muscle contains a specialised carrier protein called ___
- 2. thin filament in muscle fibril
- 3. adult stem cells that exist in tissues
- 4. the process of cells becoming different
- 5. the motion used by flagella to move cells
- 6. stem cells that can become many different cells
- 8. formal name for red blood cell
- 9. zona pellucida prevents multiple ___
- 10. the shape of the sperm head makes the cell ___
- 11. contains digestive enzymes used to digest part of the egg
- 13. white blood cell that uses phagocytosis to protect
- 15. _______ organisms need specialised cells as they have smaller surface area to volume ratio
- 17. not having this increases volume in the RBC
- 19. single cell organisms have a ____ surface area to volume ratio