Across
- 3. an infectious disease that enters your body through breathing.
- 7. a liquid that carries blood cells.
- 8. a type of muscle tissue that contracts involuntarily.
- 11. the hard dense part of the musculoskeletal system.
- 12. carries blood toward from the heart.
- 13. carries blood away from the heart.
- 14. a collection of similar cells that perform a function.
- 16. circulates through the entire body.
- 18. a large sheet of muscle underneath the lungs.
- 20. starts the process of breaking down food.
- 21. help move mucus and filter material.
- 24. where gas exchange takes place between air and blood.
- 27. a type of tissue made up of neurons.
- 28. attach muscle to bones.
- 30. connects your mouth to your stomach.
- 31. a flexible cushion for bones.
Down
- 1. a protein which carries oxygen.
- 2. also called the windpipe.
- 4. breathing in.
- 5. also called the throat.
- 6. a type of muscle tissue that must contract voluntarily.
- 9. receive electrical signals.
- 10. help with clotting.
- 15. contains cells that produce digestive enzymes and acids.
- 17. tiny vessels that allow diffusion.
- 19. breathing out.
- 22. send electrical signals to another nerve.
- 23. holds bones together.
- 25. a type of cell that can differentiate - become specialized.
- 26. pumps blood
- 29. a structure composed of different tissues working together.