Respiratory and Circulatory System

123456789101112131415161718192021222324252627282930313233343536373839
Across
  1. 3. Tiny air sacs in the lungs where oxygen moves into the blood and carbon dioxide leaves.
  2. 6. A gas needed by every cell in the body, brought in through breathing and transported by the blood.
  3. 10. The protein in red blood cells that attaches to oxygen in the lungs and carries it to tissues.
  4. 13. The smaller branches of the bronchi that lead directly into the alveoli of the lungs.
  5. 14. A bacterial infection of the lungs that can cause coughing, chest pain, and damage to the respiratory system.
  6. 16. Small parts of cells in the blood that help stop bleeding by forming clots.
  7. 17. Bands of tissue in the larynx that vibrate to produce sounds when we speak or sing.
  8. 18. The windpipe, a tube that carries air from the throat down into the bronchi and lungs.
  9. 21. The tiniest blood vessels where oxygen and nutrients pass into body cells and waste products leave.
  10. 23. A flap of tissue that covers the trachea when you swallow to keep food and drink from entering the airway.
  11. 24. The process of taking in oxygen and releasing carbon dioxide, both in the lungs and in cells.
  12. 26. A condition where the airways swell and tighten, making it difficult to breathe and often causing wheezing.
  13. 28. The largest artery in the body that carries oxygen-rich blood from the left ventricle to the whole body.
  14. 30. A thick, sticky fluid produced in the airways that traps dust, dirt, and microbes.
  15. 32. The liquid portion of blood that carries nutrients, hormones, and proteins throughout the body.
  16. 33. A contagious viral infection of the respiratory system that causes fever, cough, and body aches.
  17. 34. The rhythmic beating felt in arteries that shows the rate at which the heart is pumping blood.
  18. 36. A condition of abnormally high blood pressure that can strain the heart and damage blood vessels.
  19. 39. Thick-walled blood vessels that carry oxygen-rich blood away from the heart to the body.
Down
  1. 1. The waste gas made by cells, carried by blood to the lungs, and released when we exhale.
  2. 2. The dome-shaped muscle at the bottom of the chest that moves up and down to help breathing.
  3. 4. The process of moving air into and out of the lungs during breathing.
  4. 5. Small arteries that branch into capillaries and help regulate blood flow into tissues.
  5. 7. A term used for anything related to the lungs, such as pulmonary arteries or diseases.
  6. 8. The continuous movement of blood around the body through the heart and blood vessels.
  7. 9. The two lower chambers of the heart that pump blood out to the lungs and the body.
  8. 11. Two large organs in the chest that take in oxygen and release carbon dioxide during breathing.
  9. 12. Two main air passages that branch from the trachea and carry air into the left and right lungs.
  10. 15. Cells that carry oxygen from the lungs to the body and bring carbon dioxide back to the lungs.
  11. 19. A condition where the body has too few red blood cells or hemoglobin, causing tiredness.
  12. 20. A lung disease that damages air sacs, making it difficult to exhale fully and breathe easily.
  13. 22. A sudden brain injury caused by a blocked or burst blood vessel, cutting off oxygen supply.
  14. 25. Structures in the heart and veins that prevent blood from flowing backward, ensuring circulation goes in one direction.
  15. 27. An inflammation of the bronchi that causes coughing, mucus production, and breathing problems.
  16. 29. Also called the voice box, it sits on top of the trachea and contains the vocal cords.
  17. 31. A muscular organ that pumps blood through the entire body to deliver oxygen and nutrients.
  18. 35. Blood cells that protect the body by attacking and destroying bacteria, viruses, and other invaders.
  19. 37. The throat passage that connects the mouth and nose to the esophagus and the larynx.
  20. 38. Blood vessels that carry blood back to the heart, usually low in oxygen but rich in waste.
  21. 39. One of the two upper chambers of the heart that receives blood returning from the body or lungs.