The Human Body

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Across
  1. 1. — organ that stores urine before it leaves the body.
  2. 4. — organ that mixes food and helps break it down.
  3. 7. — flexible tissue that cushions joints and shapes parts like the ear and nose.
  4. 8. — wave‑like muscle movements that push food through the digestive tract.
  5. 10. — a protein produced by the immune system to fight specific germs.
  6. 11. — a protein that speeds up chemical reactions, such as digestion.
  7. 12. response — the body’s reaction to harmful pathogens.
  8. 16. — the process of breaking down food into nutrients the body can use.
  9. 17. — blood vessel that carries blood toward the heart (usually oxygen‑poor).
  10. 22. system — muscles that allow movement and maintain posture.
  11. 23. system — organs (like lungs) that bring in oxygen and remove carbon dioxide.
  12. 25. — the organ that controls thought, memory, and body functions.
  13. 26. — the fluid that carries oxygen, nutrients, and wastes throughout the body.
  14. 28. — blood vessel that carries blood away from the heart (usually oxygen‑rich).
  15. 30. — a gas the body uses to make energy.
  16. 31. system — cells and organs that defend the body from infection and illness.
  17. 32. — the organ that pumps blood.
  18. 34. — organ that filters blood and makes urine.
  19. 36. — where two bones meet and allow movement (e.g., knee, elbow).
  20. 37. — an automatic response to a stimulus (e.g., pulling hand away from something hot).
  21. 40. — a germ (bacteria, virus, fungus) that can cause disease.
  22. 42. (small intestine, large intestine) — organs that absorb nutrients and water.
  23. 44. — when pathogens enter and multiply in the body causing illness.
  24. 45. (cardiovascular) system — heart and blood vessels that move blood through the body.
  25. 46. system — brain, spinal cord, and nerves that send signals and control the body.
  26. 47. — the smallest unit of life; building block of the body.
  27. 48. — a body part made of tissues that has a specific job (e.g., heart, lungs).
Down
  1. 2. system — organs that break down food and absorb nutrients.
  2. 3. — a blood cell fragment involved in clotting.
  3. 5. — organs that take in oxygen and release carbon dioxide.
  4. 6. — a substance that helps the immune system protect against disease.
  5. 9. — tissue that connects muscle to bone.
  6. 13. — all chemical processes that occur in the body to maintain life (breaking down and building up).
  7. 14. system — glands that release hormones to regulate body functions.
  8. 15. — a group of similar cells that work together.
  9. 18. — a nerve cell that carries messages (electrical signals).
  10. 19. — tiny blood vessels where oxygen and nutrients pass to cells.
  11. 20. dioxide — a waste gas produced by cells and removed by the lungs.
  12. 21. — chemical messenger produced by glands that affects growth and activity.
  13. 24. — the study of body structure and parts.
  14. 27. — tissue that connects bones to other bones at a joint.
  15. 29. system — organs involved in producing offspring (basic, age‑appropriate terms).
  16. 33. (body system) — a group of organs that work together (e.g., digestive system).
  17. 35. system — bones and joints that support and protect the body.
  18. 38. cord — the bundle of nerves that runs down the backbone and connects the brain to the body.
  19. 39. — the body’s ability to keep internal conditions stable (temperature, water balance).
  20. 41. — a substance (like protein, carbohydrate, fat, vitamins, minerals) that the body needs.
  21. 43. (urinary) system — organs that remove wastes and extra water (e.g., kidneys, bladder).