The Digestive System

The Digestive System The digestive system is comprised of the alimentary canalize and the ancillary digestive variety meat, the digestive system breaks down aliment into alcohol-soluble particles runty enough to pass into body cells to be engage for energy, growth and repair. Various chemical processes take place during digestion which enables preoccupancy of nutrients and elimination of waste by egestion (process of eliminating undigested nutrition from the body); the digestive process can take several hours and involves many incompatible organs. The alimentary canal consists of the following parts: Mouth, pharynx, oesophagus, stomach, small intestine, big(p) intestine, rectum and anal canal. The alimentary canal and the accessory digestive organs ar supplied by two types of nerves, extrinsic (outside) nerves from the unconscious part of the brain or spinal cord and untransferable (inside) nerves. Extrinsic nerves bother the chemicals acetylcholine an d adrenaline. Acetylcholine increases the pressure exerted by the brawniness mold of the digestive tract for optimum passage of food for thought and unstable through the digestive tract, this chemical also encourages the action of digestive juice from the stomach and pancreas. The chemical adrenaline slows or stops digestion.

Intrinsic nerves argon located in the walls of the esophagus, stomach, small intestine and colon and when stretched by food release substances to stop number up or delay production of digestive juice or movement of food by the digestive organs A major component in digestion are enzymes, these are present in most of the alimentary organs, they are do of protein and speed up chemical reactions i! n the body while maintaining normal cell temperature. Mouth solid and liquid food are taken into the body via the mouth; saliva is secreted by three pairs of salivary glands: Saliva contains water, mineral salts, lysozyme, immunoglobulins, blood wrick factors, mucus and salivary amylase (a digestive enzyme). Saliva helps lubricate the...If you requisite to get a full essay, order it on our website: OrderEssay.net

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