Across
- 2. hollow tube connecting the pharynx to the stomach
- 3. gland at the base of the brain that regulates other endocrine glands
- 4. thin-walled vessels where gas exchange with tissues occurs
- 7. valve preventing backflow of blood into the heart ventricles
- 9. passive transport without the assistance of membrane proteins
- 15. iron-containing protein in red blood cells that carries oxygen
- 17. organ that stores and concentrates bile
- 20. windpipe that conducts air to the lungs
- 22. process of breathing in oxygen and out carbon dioxide
- 23. tiny blood vessels that connect arterioles and venules
- 26. substance formed by the liver as a result of detoxifying ammonia
- 28. filtering units in the kidneys that remove waste from blood
- 30. part of the large intestine where water is absorbed
- 31. partly digested food that leaves the stomach
- 32. voice box containing the vocal cords
- 35. blood vessels that carry blood away from the heart
- 36. chemical messengers released by endocrine glands
- 39. chamber of the heart that receives deoxygenated blood from the body
- 41. organs that filters blood to form urine
- 42. tiny air sacs in the lungs where gas exchange occurs
Down
- 1. microscopic structures in respiratory system to remove impurities
- 2. hormone that controls fight-or-flight response and treating life-threatening conditions
- 5. glands on top of the kidneys that produce stress hormones
- 6. fluid part of blood transporting cells and nutrients
- 8. digestive enzyme in saliva that breaks down starches
- 10. muscle contractions that move food through the digestive tract
- 11. organ where most nutrient absorption occurs
- 12. specialized bundle of capillaries where filtrate is produced
- 13. substance that emulsifies fats in the digestive process
- 14. finger-like projections in the small intestine that absorb nutrients
- 16. blood vessels that carry blood back to the heart
- 18. gland in the neck that regulates metabolism
- 19. tube that carries urine from the kidney to the bladder
- 21. the big blood vessel carrying oxygen-rich blood from the heart to the body
- 23. blood vessel providing the heart muscle with blood
- 24. hormone produced by the pancreas that lowers blood glucose levels
- 25. largest internal organ that produces bile
- 27. main passageways into the lungs
- 29. class of enzymes that breakdown proteins
- 33. muscular partition separating the chest from the abdominal cavity
- 34. opening through which urine is expelled from the body
- 37. vital for breaking down glucose and other sugars to release ATP energy
- 38. hormone produced by the pancreas that raises blood glucose levels
- 40. flap of tissue that prevents food from entering the windpipe