Biology Assignment 1

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Across
  1. 4. Small fragment of cells that help blood to clot when a blood vessel is damaged
  2. 5. A patch that was made up of fat, cholesterol, blood cells and other substances
  3. 6. A yellowish component of blood that holds all blood cells
  4. 8. Something that happens if the blood supply to your brain is blocked
  5. 10. Something that keep veins flowing in the right direction and prevent backflow
  6. 11. A thin-walled blood vessel with valves that leads blood towards the heart
  7. 13. A shape which is flat and thin in middle
  8. 14. A thick-walled blood vessel that carries blood away from the heart
  9. 15. A deficiency disease in human caused by lack of iron
Down
  1. 1. A thin-walled blood vessel used to deliver substance to cell
  2. 2. A chemical that carries oxygen inside red blood cell
  3. 3. The regular throb of an artery than indicates your heart rate
  4. 7. Something that happens if the artery that supplies blood to heart is blocked
  5. 9. A process where molecules move in and out of blood from high concentration to low concentration
  6. 12. The organ that pumps blood around your circulatory system