B4 Organising plants and animals

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Across
  1. 3. the waste product formed by the breakdown of excess amino acids in the liver
  2. 4. a metal mesh placed in a blocked or partially blocked artery.
  3. 7. the name given to cells that make up the outer layer of an organism.
  4. 9. the lower layer of mesophyll tissue in plant leaves that contains many large air spaces to give a big surface area for the exchange of gases.
  5. 12. the cells that surround the stomata in the leaves of plants.
  6. 13. chambers of the heart that contract to force blood out of the heart.
  7. 15. the smallest blood vessels.
  8. 17. blood vessels that carry blood away from the heart.
  9. 18. the artery that leaves the heart from the left ventricle
  10. 20. the blood vessels that supply oxygenated blood to the heart muscle.
  11. 22. the red pigment that carries oxygen around the body in the red blood cells
Down
  1. 1. drugs used to lower blood cholesterol levels and improve the balance of high- to low-density lipoproteins in the blood
  2. 2. the living transport tissue in plants that carries dissolved food (sugars) around the plant.
  3. 5. the movement of sugars from the leaves to the rest of the plant through the phloem
  4. 6. the non-living transport tissue in plants that transports water from the roots to the leaves and shoots.
  5. 8. fragments of cells in the blood that play a vital role in the clotting mechanism of the blood.
  6. 10. the upper layer of the mesophyll tissue in plant leaves.
  7. 11. They usually carry deoxygenated blood and have valves to prevent the backflow of blood.
  8. 14. the loss of water vapour from the leaves of plants through the stomata.
  9. 16. the upper chambers of the heart
  10. 19. the large artery that takes deoxygenated blood from the right ventricle of the heart to the lungs.
  11. 21. the clear yellow-liquid part of the blood that carries dissolved substances and blood cells around the body.