Gas Exchange In Animals & Plants

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Across
  1. 1. Organelles in plant cells where photosynthesis takes place.
  2. 4. A gas that is essential for aerobic respiration.
  3. 8. Tiny air sacs in the lungs where gas exchange occurs.
  4. 9. The process of taking in oxygen and releasing carbon dioxide in both plants and animals.
  5. 12. A waste gas produced by respiration and used by plants in photosynthesis.
Down
  1. 2. The process by which plants use sunlight to synthesize foods from carbon dioxide and water.
  2. 3. The windpipe that connects the larynx to the lungs in animals.
  3. 5. Respiratory organs found in many aquatic organisms that extract oxygen from water.
  4. 6. The movement of molecules from an area of higher concentration to an area of lower concentration.
  5. 7. Small blood vessels where gas exchange occurs in animals.
  6. 10. Pores on the surface of leaves that allow gas exchange.
  7. 11. A protein in red blood cells that carries oxygen.