Digestion is the process whereby a biological entity processes a substance, in order to chemically convert the substance into nutrients.
Digestion occurs at the multicellular, cellular, and sub-cellular levels.
Digestion usually involves mechanical manipulation and chemical action.
In most vertebrates, digestion is a multi-stage process in the digestive system, following ingestion of the raw materials, most often other organisms.
The process of ingestion usually involves some type of mechanical manipulation.
For more information about the topic Digestion, read the full article at Wikipedia.org, or see the following related articles:
Editor's Note: This article is not intended to provide medical advice, diagnosis or treatment.
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