Across
- 2. The process by which organisms exchange gases especially oxygen and carbon dioxide.
- 4. main type of sugar in the blood and is the major source of energy for the body's cells.
- 5. triphosphate the source of energy for use and storage at the cellular level.
Down
- 1. the clear liquid that has no color, taste, or smell, that falls from clouds as rain, that forms streams, lakes, and seas, and that is used for drinking
- 3. A nonmetallic element that exists in its free form as a colorless, odorless gas and makes up about 21 percent of the Earth's atmosphere.