Across
- 2. ____ make sure that blood doesn't flow backwards
- 5. the blood leaves the heart through the ______
- 7. separates the right and left chambers
- 8. joints that are freely moveable
- 10. outside layer of the heart
- 13. hollow tube where hair roots are
- 16. circular movement of a muscle
- 18. the skeletal system is separated into appendicular and ___
- 20. another term for oil gland
- 27. lymph enters the right lymphatic duct or ____ duct
- 28. y-shaped proteins that attach to antigens on pathogens
- 29. stage of respiration involving the bloodstream and cells
- 33. layer of skin where new cells are made
- 35. leaflike structure closing the opening into the larynx
Down
- 1. lymph first enters through the lymphatic _____
- 3. body plane that separates into superior and inferior
- 4. lymph leaves the ducts through the _____ veins
- 6. the outside layer of the skin
- 9. bones that line the spinal cord down the back are called
- 11. turning the toes up toward the body
- 12. structure that filters the air that is breathed in
- 14. the respiratory system exchanges carbon dioxide and _____
- 15. the process of breathing involves inhalation and ____
- 17. cells that contain melanin and give skin color
- 19. bones are connected to others by ______
- 21. ability of a muscle to respond to stimuli such as nerve impulses
- 22. muscle shrinking or wasting away is called ____
- 23. the circulatory system uses ____ to circulate oxygen
- 24. the long part or shaft of long bones
- 25. body plane that separates into anterior and posterior
- 26. the lymphatic system works to prevent _____
- 30. there are four _____ quadrants of the body
- 31. muscles in the heart are called ____ muscle
- 32. groups of cells make up
- 34. groups of organs make up