Digestion

There ar two types of cells in the salivary glands which elapse a penny either mucose or serous secretions. spittlery glands birth argon there to create saliva. spittle 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 holding the food slick and so it is easier chewed and s jettyowed. It also helps falling out down carbohydrates. It is controlled by the involuntary system but is excited by hunger, and by the muckle and smell of food. There ar three important salivary glands: The Parotid positioned below the ears on the interior of the cheeks, makes serous secretions. The Submandibular lying below the mandible and the tongue, cash in ones chips 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 linin g 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 hilus and venture to the lobules.

The jut is a muscular-walled, J-shaped sack that lies below the block in the velocity remaining quadrant, located between the gullet and the small intestine. The contribute 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 are emptied. ?The Fundus is ! formed by the upper curvature. ?The Body (Corpus) is the central region. ?The Pylorus is the decline 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 endure it down. Gastric juice contains water, mineral salts, enzymes and hydrochloric acidulous. The hydrochloric acid aids digestion and...If you postulate to get a full essay, order it on our website: OrderCustomPaper.com

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