March 21, 2008

Digestive System

Filed under: — Peter Laws @ 4:20 am

Digestive SystemThe digestive system’s primary function is to convert food into energy and convert waste into excretable material. The digestive tract and its accompanying digestive organs are responsible for the absorption and digestion of all digestible products. The digestive system sustains life via its ability to relieve the body of its inability to provide nutrients for its systems, tissue, and bodily fluids. Without the digestive system, all other systems would eventually fail to operate, fluids would either stop production or dry up, and tissue would deteriorate.

Digestible product is utilized at the cellular level, which the digestive system readily prepares for cellular use. Nutrients from food or other nutritious edible product are broken down and the remaining nutrients are used for chemical reactions which allow cells throughout the body to reproduce, repair, cellular division, cellular growth, heat production, energy production, and the synthesis of enzymes which allow these functions to occur.

Food which is consumed by a human can not be used for cellular health until after it has been broken down both mechanically and chemically for the use of meeting cellular needs. The broken down and digested foods turn into nutrients which are then absorbed through the intestinal wall. The nutrients are then transferred to the cells via the blood stream and delivered to the site of cells which are in need of the nutrients. Food is not considered to be digested until after absorption, which applies to a small percentage of food as most of the food eaten is never absorbed and is passed through the excretory system. Only usable nutrients and chemicals are absorbed and brought to the appropriate cellular group for nutritional function.

Ingestion is the process of eating. In reference to the digestive system, this typically means food however it may include vitamin supplements, medications, and liquids.

Mastication is the process of mixing edible elements with saliva for the purposes of breaking the edible elements down. This process typically involves chewing.

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