Across
- 4. blood cell blood cells that engulf and digest bacteria and fungi
- 6. any of the small tubules that are the excretory units of the vertebrate kidney
- 8. a flap of cartilage that covers the windpipe while swallowing
- 11. tough elastic tissue, mostly converted to bone in adults
- 12. muscle a muscle that contracts without conscious control and found in walls of internal organs such as stomach and intestine and bladder and blood vessels (excluding the heart)
- 16. muscle the muscle tissue of the heart
- 18. the chief solid component of mammalian urine
- 20. a digestive juice secreted by the liver
- 22. muscle a muscle that contracts without conscious control and found in walls of internal organs such as stomach and intestine and bladder and blood vessels (excluding the heart)
- 23. a red protein in blood that transports oxygen
- 24. a dense fibrous membrane covering the surface of bones (except at their extremities) and serving as an attachment for tendons and muscles; contains nerves and blood vessels that nourish the enclosed bone
Down
- 1. a band of fibrous tissue connecting bones or cartilages
- 2. a clear liquid secreted by glands in the mouth
- 3. a muscular partition in the chest used in respiration
- 5. muscle striated muscle that can be controlled voluntarily
- 7. a blood vessel that carries blood toward the heart
- 9. the watery fluid in which blood cells are suspended
- 10. a chamber of the heart that receives blood from an atrium
- 13. the structure containing the vocal cords
- 14. a band of tissue connecting a muscle to its bony attachment
- 15. blood cell a mature blood cell that contains hemoglobin to carry oxygen to the bodily tissues; a biconcave disc that has no nucleus
- 17. a chamber connected to other chambers or passageways
- 19. a blood vessel that carries blood from the heart to the body
- 21. the passage between the pharynx and the stomach