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ShareDigestion 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:
Gastrointestinal tract — The gastrointestinal tract or digestive tract, also referred to as the GI tract or the alimentary canal or the gut, is the system of organs within ... > read more
Stomach — In anatomy, the stomach is an organ in the gastrointestinal tract used to digest food. In general, the stomach's primary function is not the ... > read more
Esophagus — The esophagus (also spelled oesophagus/œsophagus), or gullet is an organ in vertebrates which consists of a muscular tube through which food ... > read more
Cells of the stomach — Parietal cells (also called oxyntic cells) are the stomach epithelium cells which secrete gastric acid. Parietal cells produce gastric acid ... > read more
Salivary gland — The salivary glands produce saliva, which keeps the mouth and other parts of the digestive system moist. It also helps break down carbohydrates (with ... > read more
Editor's Note: This article is not intended to provide medical advice, diagnosis or treatment.
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