Cells and Systems

Edit Answers
1234567891011121314151617181920212223
Across
  1. 1. Blood vessels that carry blood from the body back to the heart.
  2. 3. _________ digestion is the breakdown of large food particles to smaller food particles by enzymes and chemical processes.
  3. 9. _______ digestion is the physical breakdown of food into small particles.
  4. 10. _______ system: Breaks down food into smaller parts for absorption into the body.
  5. 11. Tiny blood vessel that connects arteries to veins; once cell thick and extremely narrow.
  6. 13. Diffusion of water through a selectively permeable membrane.
  7. 14. Organelle that stores water and other substances required by the cell.
  8. 17. _______ system: Coordinates and controls all organs and organ systems; detects, processes, and responds to stimulii.
  9. 18. Organelle that converts sunlight into food; found only in some plant cells.
  10. 20. Group of similar cells working together to perform a specific function.
  11. 21. A structure or behaviour that increases the organisms chance of survival or reproduction.
  12. 22. Blood vessel that carries blood from the heart to the rest of the body.
  13. 23. The movement of particles from an area of higher concentration to an area of lower concentration.
Down
  1. 2. Organelle that directs all the activities in a cell. Contains all of the cell's DNA.
  2. 4. Thin structure that encloses all the contents of plant and animal cells; has tiny openings that allow particles of some substances, but not others, to pass through.
  3. 5. The basic unit of life.
  4. 6. Organelles that convert energy the cell receives into a form that it can use.
  5. 7. __________ transport is the movement of particles/molecules by a cell; energy is required to accomplish the movement.
  6. 8. Tiny air-filled sacs at the end of the bronchial tubes in your lungs, where gas exchange takes place (oxygen is absorbed and carbon dioxide is excreted).
  7. 11. Outer covering of a cell that provides strength and support; found only in plant cells.
  8. 12. _______ system Supplies blood with oxygen from the outside air and removes carbon dioxide from you blood.
  9. 15. _______ system: transports blood reaching every cell in the body.
  10. 16. _______ system: Removes chemicals and gaseous wastes from the body.
  11. 19. _________ Adaptation is an action or activity that increases the organisms chance of survival or reproduction.