MCQOPTIONS
Saved Bookmarks
| 1. |
The main function of the human digestive system is to |
| A. | Break down foods for absorption into the blood |
| B. | Exchange oxygen and carbon dioxide in the lungs |
| C. | Release energy from sugars within the cells |
| D. | Carry nutrients to all parts of the body |
| Answer» B. Exchange oxygen and carbon dioxide in the lungs | |