Circulation, Respiration and Digestion

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Across 1. healthy systolic pressure should be _____ 140. 3. the smallest vessels in the body, only one cell layer thick 5. these smaller branches feed into veins 8. arteries carrying blood to the arms 10. ventricle of the heart that pump blood into the aorta 11. used to listen to blood squirting through artery when measuring blood pressure 16. the ______ ventricle pumps blood to the lungs 17. watery fluid that makes up blood 19. "AB" blood type is the universal ________ because they have no plasma proteins that would clot with other blood types. 21. number of valves in the heart 23. arteries carrying blood to the upper legs 25. largest chambers of the heart 26. return blood to the heart, can stretch many times normal size, and have backflow valves 27. which has a thicker wall, an artery or a vein? 28. blood disease where WBC have extremely enlarged nuclei. 29. used in measuring blood pressure to cut off blood supply and measure pressure when blood squirts through reopened artery.

Down 2. "O" blood type is the universal ______ because they have no RBC proteins that would clot other blood types 4. blood disease RBCs rupture (burst) thus causing loss of oxygen to body cells 6. pressure of blood when ventricles CONTRACT 7. name for molecule in RBC that carries oxygen 9. arteries branch into smaller vessels called ________. 12. this node is in the right atrium and starts the heartbeat, also called the pacemaker 13. largest artery in the body, comes out of the heart 14. arteries carring blood to the head and neck 15. pressure of blood when ventricles RELAX 18. blood returns to the heart through these two veins (2 words) 20. blood type is determined by _______ on the red blood cells or plasma of a person. 22. normal human RBCs do not have one of these 24. deoxygenation blood returns to the heart in the right ______.

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