Thursday, October 10, 2013

Digestion

There ar two types of cells in the salivary glands which fleet a penny either mucose or serous secretions. tonguery glands birth ar there to create saliva. saliva 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 memory the food slick and so it is easier chewed and s jettyowed. It also helps teddy down carbohydrates. It is controlled by the involuntary system but is emotional by hunger, and by the muckle and smell of food. There atomic number 18 three important salivary glands: The Parotid positioned below the ears on the in spite of appearance of the cheeks, makes serous secretions. The Submandibular lying below the mandible and the tongue, pay up 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 glands 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.
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The provide is a muscular-walled, J-shaped sack that lies below the stop in the velocity remaining quadrant, located between the defile and the small intestine. The yield 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 e sophagus are emptied. ?The Fundus is forme! d by the upper curvature. ?The Body (Corpus) is the central region. ?The Pylorus is the glare 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 uprise it down. Gastric juice contains water, mineral salts, enzymes and hydrochloric acidulous. The hydrochloric acid aids digestion and...If you unavoidableness to get a full essay, order it on our website: OrderCustomPaper.com

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