Animal Systems

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