Across
- 2. the body system that includes the blood, the heart, and the blood vessels
- 4. the largest organ of the lymphatic system which recycles old blood cells and makes new ones
- 5. a pale yellow fluid that is the main liquid in blood
- 7. a tiny blood vessel that carries blood to individual cells
- 17. fluid drained from body tissues, which contains protein, salt, sugar, and nitrogen wastes
- 20. the system that includes the skin of the human body
- 21. a narrow, dead-end tube connected to the large intestine
- 22. a blood vessel that carries blood to the heart
- 23. a group of body organs working together to perform a major function
- 25. a blood cell which carries oxygen and carbon dioxide
- 26. a body unit consisting of various kinds of tissues that work together
- 28. a strong band of cartilage that holds a joint firmly in place
- 30. a membrane that lines body passages and secretes mucus to remove and destroy disease germs
- 33. the system that includes the kidneys and associated organs
- 34. a whole body
- 37. a group of cells that specialize in the same function
- 38. a muscle that causes a joint to unbend
- 39. any item that stimulates the production of antibodies
- 43. the resistance to infection by a certain disease germ
- 44. a tough tissue that connects a muscle to a bone
- 45. a blood vessel that carries blood away from the heart
Down
- 1. the tiny sacs in the lungs where oxygen and carbon dioxide are exchanged
- 3. one of six lymphatic organs in the throat
- 6. a substance in the blood that fights a certain germ or group of related germs
- 8. one of the smallest organs of the lymphatic system, which produce a kind of white corpuscle and remove foreign materials
- 9. a place where two bones meet
- 10. the opening at the top of the voice box
- 11. a muscle that causes a joint to bend
- 12. a blood cell, which fights disease germs
- 13. the dome-shaped muscle that contracts to bring air into lungs
- 14. the outer layer of skin on the human body
- 15. a gland between the heart and the sternum which makes lymph cells that destroy viruses and cancer cells
- 16. the organ that pumps blood throughout the body
- 18. one of the two main organs of the respiratory system, consisting of a spongy mass of tubes and air sacs
- 19. one of the tiny purifying structures in the kidneys
- 24. the system that consists of the 206 bones of the human skeleton
- 27. either of two tubes that carry air from the windpipe to a lung
- 29. the body system that includes the lungs and other organs used in breathing
- 31. the system that includes the muscles of the human body
- 32. the flap that covers the glottis in swallowing
- 35. a tiny disc shaped body that is important in the clotting of blood
- 36. the inner layer of skin
- 40. the windpipe
- 41. one of the two main organs that filter urea and other wastes out of the blood
- 42. a network of vessels and nodes that follow the circulatory system and provide drainage and defense