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By Robert Sullivan

Digestion is the method of taking meals and nutrition into the physique and making them to be had to be used in the entire body's tactics. This ebook describes the trail that foodstuff takes in the course of the method, the organs concerned, and the way the physique makes use of sorts of food.

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Sample text

This covering is also called the visceral peritoneum, meaning the connective tissue covering of the visceral organs in the abdominal cavity. This layer is made of dense, fibrous connective tissue throughout the tube. The only difference is the name given to the covering, based on the location of that part of the tube. The serosa/ adventitia of both cattle and pigs is used commercially as the outer covering or casing on sausages, kielbasa, and certain types of hot dogs. Summary of the Digestive Process The process of taking food into the mouth is called ingestion.

All teeth have a common structure and have hard enamel to protect underlying tissues from decay and damage. Chewing and swallowing The mouth is bordered by the lips, cheeks, palate, floor, and pharynx. The tongue helps to manipulate food during chewing, and it is also essential in speech. Taste buds on the tongue are stimulated by different chemicals. The saliva produced by salivary glands moistens the food and begins the chemical digestion of starches and triglycerides. Food, in the form of a bolus, passes from the mouth to the pharynx and into the esophagus for passage to the stomach.

The skin at the edges of the lips is thin, allowing the natural red coloring of blood to tint the lips. 1 Humans are born with two sets of teeth: (a) deciduous (milk) teeth and (b) permanent teeth. The deciduous teeth erupt from the gums around six months of age, and generally finish growing at about two years. At about age 7, children begin to lose their baby teeth, which are gradually replaced by the permanent teeth. lips do not have any sweat glands, so they must be moistened on a regular basis or the skin may become dry, crack, and possibly bleed.

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