Respiration

1. The gas needed for aerobic respiration.
3. Body tissues that contract and need extra energy during exercise.
5. The molecule broken down in respiration to release energy.
7. Released in respiration and used for metabolism, movement, and temperature regulation.
11. The physical process of moving air into and out of the lungs.
13. A type of respiration that releases energy without using oxygen.
14. All the chemical reactions that happen inside a living organism.
16. A reaction that takes in energy from the surroundings.
17. A product made during aerobic respiration alongside carbon dioxide.
18. A substance produced in muscles during anaerobic respiration in animals.
21. The process in yeast that produces ethanol and carbon dioxide.

2. A stored form of glucose found mainly in the liver and muscles.
4. A waste gas produced during respiration and removed from the body by the lungs.
6. The extra oxygen needed after exercise to remove lactic acid.
8. The organelle where aerobic respiration happens.
9. A reaction that releases energy to the surroundings.
10. A type of respiration that uses oxygen to release energy.
12. A chemical process that releases energy from glucose in cells.
15. The part of the cell where anaerobic respiration takes place.
19. An alcohol produced by anaerobic respiration in yeast.
20. An organ that converts lactic acid back into glucose after exercise.