Across
- 4. constantly moving
- 7. any of a large group of organic compounds occurring in foods and living tissues
- 10. moving choppily with short bursts of energy
- 11. the tissues in your body that you use to exercise
- 13. a simple sugar that is an important energy source
- 14. a colorless, transparent liquid
Down
- 1. a substance deposited in bodily tissues
- 2. the strength and vitality required for sustained physical or mental activity
- 3. the amount of energy that foods will produce
- 5. the gas that we breathe
- 6. a natural oily or greasy substance occurring in animal bodies
- 7. of or relating to the heart
- 8. the central part of your body that pumps blood
- 9. activity requiring physical effort
- 12. any of a class of nitrogenous organic compounds