Digestion

There argon two types of cells in the salivary glands which dismiss a penny either mucose or serous secretions. spittlery glands birth ar there to create saliva. tongue is made up of 99.5 per cent water, mineral salts and an enzyme called ptyalin which starts digestion of starchy foods. Saliva keeps parts of the digestive system wet and assists in charge the food slick and so it is easier chewed and s jettyowed. It also helps resolve down carbohydrates. It is controlled by the involuntary system but is affect by hunger, and by the muckle and smell of food. There are three important salivary glands: The Parotid positioned below the ears on the at heart of the cheeks, makes serous secretions. The Submandibular lying below the mandible and the tongue, leap serous and mucous. The Sublingual remain under the tongue, makes mucus secretions. In addition to this, it is known that umteen small accessory glands are found in mucous membranes lining the tongue. The g lands are inside a capsule of association tissue. Inside it is made up of parts called lobules connected unneurotic by areolar tissue. Cells in the lobule secrete the salvia. Blood vessels and brace enter the glands at the hilum and venture to the lobules.

The underpin is a muscular-walled, J-shaped sack that lies below the arrest in the velocity remaining quadrant, located between the gullet and the small intestine. The live on wall has four main layers: the serosa, muscularis, submucosa and mucosa. The stomach itself is divided into four main sections: ?The Cardia - where contents of the esophagus a re emptied. ?The Fundus is formed by the u! pper curvature. ?The Body (Corpus) is the central region. ?The Pylorus is the get off section, which aids the emptying serve up into the small intestine. The stomach is where food is stored, churned and mixed with gastric juices in request to fragmentize it down. Gastric juice contains water, mineral salts, enzymes and hydrochloric acidulous. The hydrochloric acid aids digestion and...If you compliments to get a full essay, order it on our website: OrderCustomPaper.com

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