Across
- 4. An organ that exchanges carbon dioxide with the blood
- 5. Where the digestion starts
- 10. A group of similar cells that perform the same function
- 11. A blood cell that fights disease
- 12. Smallest blood vessel, stuff is being picked up and taken away
- 14. A collection of tissues that carry out a specialized function of the body
Down
- 1. The upper chamber of the heart
- 2. Carry blood back to the heart
- 3. Stores urine
- 6. Allows air to pass up from the lungs
- 7. Carry blood away from the heart
- 8. The large muscular sac that continues digestion
- 9. A basic structure of all living things kidney Filters out waste
- 13. The liquid part of the blood