Circulatory System Crossword

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Across
  1. 2. _____ flows from the lungs through the pulmonary vein into the left atrium of the heart.
  2. 6. Arteries and arterioles are relatively thick-walled, ____ vessels that transport blood under high pressure away from the heart.
  3. 12. The heart is a _____ chambered, muscular pump.
  4. 13. The left _____ pushes blood into the into the left ventricle.
  5. 16. Oxygenated blood is pumped by the left ventricle through the body via the _____.
  6. 19. The prime function of values is to control the _____ of blood.
  7. 20. Arteries carry blood away from the heart, veins carry blood towards the heart, and capillaries are the narrow ______ vessels in between.
  8. 21. The right ventricle contracts, forcing blood through ____ to the lungs.
  9. 22. Erythrocytes or red blood cells transport oxygen as _________ from the lungs to body tissues, and carbon dioxide from body tissues to the lungs.
  10. 23. Mammals have two transport systems: the blood circulatory system and the _____ system.
  11. 26. The blood circulatory system is a ____, transport system.
  12. 27. _______ are microscopically small vessels that receive blood rich in nutrients from arterioles and distribute it to body cells.
  13. 29. When the ventricles contract (______), blood pressure increases and blood is forced out the aorta and pulmonary arteries.
  14. 30. Small arteries are called __________.
  15. 31. ______ blood pressure is the most common cardiovascular condition.
  16. 32. Valves are located in the heart and _____.
  17. 33. The negative pressure in the chest during _______ draws air into the lungs, and also tends to draw blood into the veins near the heart.
Down
  1. 1. Blood is composed of cells, cell fragments, and a fluid called _______.
  2. 3. Exchange between blood plasma and intestinal fluid occurs by _____ across capillary walls.
  3. 4. Veins are connected to capillaries via small veins called ___________.
  4. 5. ______ vessels carry blood to and from all parts of the body, except the lungs.
  5. 7. The circulatory or ______ system consists of the heart and all the blood carrying vessels leading to and from it.
  6. 8. Blood movement through venules and veins is assisted by muscular body movements and _____.
  7. 9. Blood enters the heart through veins during ______, when ventricles relax and the pressure reduces.
  8. 10. ______ are cell fragments that help to clot blood.
  9. 11. Diffusion is driven by ______ gradients between plasma and interstitial fluid, and occurs along the length of the capillary.
  10. 14. The _______ arteries supply blood to the heart itself.
  11. 15. The cellular part of the blood is produced in cells located in the red bone ____.
  12. 17. __________ or white blood cells are fewer in number and neutralise and destroy any foreign protein in the body.
  13. 18. The right atrium takes in blood from the body, contracts and forces it into the right ______.
  14. 24. Blood plasma is a fluid composed of ______, products of digestion, waste products, a number of mineral ions and water.
  15. 25. Movement of blood from the right atrium to the lungs and back to the left atrium is called _____ circulation.
  16. 28. Veins and venules are ____-walled vessels that contain internal valves which direct blood coming from capillaries back to the heart.