The Circulatory System

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Across
  1. 2. Small, oval structures found along the lymph vessels
  2. 4. A blood clot that blocks blood flow
  3. 5. Foreign invaders that stimulate a reaction from the immune system
  4. 7. Aid in the movement of lymph by contraction
  5. 9. A blood clot that breaks loose and becomes lodged in another blood vessel
  6. 10. A hormone, also known as noradrenalin, responsible for stimulating the heart
  7. 14. Destroy pathogens/antigens
  8. 15. Arteries and veins that carry blood to and from the lower body, respectively
  9. 16. The process by which carbon dioxide us released from and oxygen is brought into the blood in the lungs
  10. 17. Located along the trachea, this gland produces and matures lymphocytes
  11. 18. The area within muscles where arteries become veins
  12. 19. Arteries and veins that carry blood to and from the kidneys, respectively
  13. 20. Y-shaped proteins that bind with antigens, clumping together, to be destroyed by white blood cells
  14. 21. The upper chambers of the heart
  15. 22. Returns oxygen-poor blood to the right atrium
  16. 23. A hormone, also known as adrenaline, responsible for stimulating the heart
  17. 25. Patches of lymphatic tissue located in a ring around the trachea, which are the first line of defense against pathogens entering the mouth and nose
  18. 26. Receives the impulse on the other side of the heart and causes the Purkinje fibres to contract the ventricles
  19. 28. The autonomic system subdivision which is associated with a resting state
  20. 29. Circulates blood between the heart and the body tissues
  21. 30. The lymphatic system plays a key role in defending the body from these disease-causing agents
  22. 32. The failure of blood to clot
  23. 34. Circulates blood between the heart and the lungs
  24. 37. Veins that return blood from the head to the vena cava
  25. 40. produce antibodies
  26. 43. The control center for the heart, located in the brain
  27. 45. Relaxation of the heart muscle
  28. 47. Arteries and veins that branch off the aorta to the arms, and return blood to the vena cava from the arms, respectively
  29. 49. Arteries that branch off the aortic arch and take blood to the head and brain
  30. 52. In the fetal circulatory system, the organ for exchanging oxygen, nutrients, and wastes
  31. 53. In a fetus, the duct that bypasses the liver
  32. 54. Occurs when the coronary artery is completely blocked
  33. 55. The site of production for all blood cells
Down
  1. 1. Thin-walled, valved vessels in the lymphatic system
  2. 2. Absorb fatty acids and glycerol from the villi of the small intestine
  3. 3. The autonomic system subdivision which is associated with an active/stressful state
  4. 6. The main artery leading to the lungs
  5. 7. A device for measuring one's blood pressure
  6. 8. Carries oxygen to cells, and carries carbon dioxide away from cells
  7. 11. Carries blood from the liver to the vena cava
  8. 12. The bundle of arteries and veins between a mother and their fetus
  9. 13. Blood pressure is lowest in these
  10. 24. Carries nutrient-rich blood from the intestines to the liver
  11. 27. Arteries and veins that service the heart itself
  12. 29. Initiates the heartbeat
  13. 31. The short-cut from the pulmonary trunk to the aorta in a fetus
  14. 33. A treatment for angina pectoris in which a balloon is inserted into the blocked coronary artery and inflated to clear any obstructions
  15. 35. Glands that sit atop the kidneys which secrete hormones
  16. 36. Responsible for blood clotting
  17. 38. The lower chambers of the heart
  18. 39. The pressure of blood against the walls of a vessel
  19. 41. An organ located in the upper left abdomen, which is responsible for cleansing blood by destroying old red blood cells
  20. 42. Arteries carry blood to the lower intestines
  21. 44. Blood pressure is highest in these
  22. 46. The fluid involved in the lymphatic system
  23. 48. The opening between the right and left atria in a fetus
  24. 50. The largest artery in the body
  25. 51. Contraction of the heart muscle