Circulation and Respiration

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Across
  1. 3. A type of blood cell that has no nucleus
  2. 4. What we breathe out
  3. 8. The grape like clusters of air sacs in the lungs
  4. 11. Always carries blood away from the heart
  5. 12. atrium, Receives blood from the lungs
  6. 13. Small blood vessels with thin walls that are wrapped around alveolares
  7. 15. The tube that connects the throat and bronchi (hint: Fork in the road)
  8. 17. atrium, Receives blood from all the parts of the body
  9. 18. 90% water 55% fluid 45% cells and 10% sugar, waste, and nutrients
  10. 19. Keeps blood from flowing backwards
Down
  1. 1. Pumps blood to the lungs
  2. 2. The two large lightweight organs of the respiratorysystem
  3. 5. What we breathe in
  4. 6. The large band of muscle that controls the size of the chest cavity (hint: at the bottom of the rib cage)
  5. 7. Blood cells, Contains hemoglobin which gives its red color
  6. 9. Pumps blood to all the parts of the body
  7. 10. The many little branches of respiratory system
  8. 14. Always carries deoxygenated blood towards the heart
  9. 16. Movement of the particles from an area of high concentration to low concentration