Biology bridge course

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Across
  1. 6. Two bean shaped organs
  2. 7. an organism which produces it's own food
  3. 8. connective tissue that has a matrix
  4. 11. breaks down food
  5. 12. single celled organisms
  6. 15. the bag that holds urine till it is excreted
  7. 18. a fibrous connective tissue which connects a muscle and the bone
  8. 20. happens in the presence of oxygen
  9. 21. An organ helpful in filter feeding of heterotrophs (Cnidaria) whose particles enter through intercellular digestion
Down
  1. 1. where the blood is purified
  2. 2. a common underwater plant
  3. 3. a tough elastic tissue around one's joints
  4. 4. present in chloroplast, and is a major setting for the light cycle
  5. 5. a constantly circulating fluid which provides nutrition to the body
  6. 9. a group of cells that have a similar structure and function together as an unit
  7. 10. calyx of a flower
  8. 13. Functional unit part of the kidney
  9. 14. live in fresh water and are in phylum Platyhelminthes
  10. 16. protect the middle covering of the fatty layer present in the kidney
  11. 17. a response to an internal or external stimulus
  12. 19. system A system which sends signals through neurons present in the nerve cells