The Digestive System

The Digestive System The digestive system is comprised of the alimentary line and the ancillary digestive variety meat, the digestive system breaks down commissariat into alcohol-soluble particles runty enough to pass into body cells to be hire for energy, growth and repair. Various chemical processes take place during digestion which enables concentration 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 contrast organs. The alimentary canal consists of the following parts: Mouth, pharynx, oesophagus, stomach, small intestine, better-looking 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 mind part of the brain or spinal cord and inviolable (inside) nerves. Extrinsic nerves bother the chemicals acetylchol ine and adrenaline. Acetylcholine increases the pressure exerted by the brawniness forge of the digestive tract for optimum passage of sustenance and gas through the digestive tract, this chemical also encourages the action of digestive juice from the stomach and pancreas. The chemical adrenaline slows or boodle digestion.

Intrinsic nerves ar located in the walls of the esophagus, stomach, small intestine and colon and when stretched by food release substances to animate 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 mos t of the alimentary organs, they are do of ! protein and speed up chemical reactions in the body plot of land 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 whirl factors, mucus and salivary amylase (a digestive enzyme). Saliva helps lubricate the...If you required to get a full essay, order it on our website: BestEssayCheap.com

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