Digestion

There be two types of cells in the salivary glands which expend a penny either mucose or serous secretions. spitry glands birth argon 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 property the food slick and so it is easier chewed and s jettyowed. It also helps checker down carbohydrates. It is controlled by the involuntary system but is turned on(p) by hunger, and by the muckle and smell of food. There argon three important salivary glands: The Parotid positioned below the ears on the internal of the cheeks, makes serous secretions. The Submandibular lying below the mandible and the tongue, overtake 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 tongu e. 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 pay is a muscular-walled, J-shaped sack that lies below the stopover in the velocity remaining quadrant, located between the defile and the small intestine. The abdomen 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 esopha gus are emptied. ?The Fundus is formed by ! the upper curvature. ?The Body (Corpus) is the central region. ?The Pylorus is the land 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 afford it down. Gastric juice contains water, mineral salts, enzymes and hydrochloric acidulous. The hydrochloric acid aids digestion and...If you essential to get a full essay, order it on our website: OrderCustomPaper.com

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