Revision Crossword - Cardiac Cycle and Blood Clotting

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Across
  1. 2. The vein responsible for delivering deoxygenated blood from the body back to the heart
  2. 3. An event during the cardiac cycle where the muscles in the atria contract
  3. 5. The valves that prevent blood flowing back from the ventricles into vena cava or pulmonary vein
  4. 7. Cell fragments found in blood that re responsible for helping to initiate blood clotting
  5. 9. An event during the cardiac cycle where the atria and the ventricles are relaxed
  6. 10. A group of conducting fibres found in the heart that pass electrical impulses to the ventricles
  7. 12. A term used to describe the bonding involved in the 3D shape of a protein
  8. 14. An inactive, soluble form of fibrin
  9. 15. A structure located in the right atrium that is responsible for controlling the timing of contractions during the cardiac cycle (3 words)
  10. 17. The largest artery in the human body
  11. 18. A response to pathogen exposure that usually results in reddened skin, heat, pain and swelling
Down
  1. 1. An event during electrical impulses where the inside of a neuron becomes more positive in a short period of time
  2. 4. A test that records the electrical activity of the heart
  3. 6. A hypothesis used to describe how the shape of enzyme changes as it binds a substrate (2 words)
  4. 8. An enzyme responsible for the production of fibrin
  5. 11. A class of proteins that often have hydrophilic residues on their outside surface
  6. 13. A cell with a multi-lobed nucleus that is capable of carrying out phagocytosis
  7. 16. A term that could be used to describe the series of reactions produced in response to damaged tissues, like cut blood vessels
  8. 19. A term used to refer to the "bottom" of the heart, where contractions in the ventricles start