Which is a function of the digestive system? A) to produce offspring

B) to produce secretions that regulate the body

C) to serve as a framework for the attachment of muscles

D.) to convert food into simpler chemical compounds that can be absorbed and used by the body

D

Explanation:

The digestive system contains many organs that break down the food you consume. The salivary glands in your mouth break down the food into small chunks, the stomach contains acid that breaks down the food further, especially the proteins, and finally the small intestine breaks down the food into molecules, which it then absorbs for the cells in your body to use.

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a symbiotic relationship with the mitochondria