Across
- 5. stem cells = replaces other cells
- 6. cells that secrete antibodies to fight infection
- 7. synthesize and store the brown pigment melanin
- 8. most common fibrous protein in the human body
- 10. produces collagen
- 12. strong and flexible; sheath around organs
Down
- 1. smaller amoeba-like phagocytic blood cells
- 2. another name for white blood cells
- 3. fat cells
- 4. Return to original length after stretching; example would be skin, lung tissue, arteries
- 9. stimulate inflammation after injury or infection
- 11. a chain of proteins