The Oral Cavity Is The First Part Of The Digestive System Essay

The Oral Cavity Is The First Part Of The Digestive System Essay

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The oral cavity is the first part of the digestive system, it is basically the mouth containing the teeth, the tongue, salivary glands, uvula, and the pharynx. When food enters the mouth it is welcomed by the teeth which immediately start the mechanical digestion that occurs in the mouth. The teeth work along with the tongue to turn the food into bolus (small rounded masses of chewed food). While the food is being chewed and moved around the salivary glands secrete saliva, which has the purpose of helping break down the food into simpler molecules and make it easier to be swallowed. While doing the action of swallowing, the uvula and the rest of the soft palate move to close off the nasopharynx, to stop food from entering the nasal cavity. Although the food can now only head down the oropharynx, it can still make a wrong turn and enter the windpipe. To prevent this from happening a special flap called epiglottis flops down over the opening of the windpipe, leading the food through the esophagus and down to the stomach.























(4) Pancreas, liver and gallbladder

The pancreas is a long and flat gland located deep in the belly abdomen. It is a very important part of the digestive system and it is a critical controller of blood sugar levels. It is located between the stomach and the spine, and it is both an exocrine and endocrine gland. The pancreas has an endocrine function because it releases juices directly into the bloodstream, and it has an exocrine function because it releases juices into ducts. The path in which the pancreas delivers the juices, meaning directly or into ducts, is the main difference of an endocrine and exocrine function. The pancreas produces some important hormones, enzymes: proteases, lipa...


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...l body cavity inferior to the stomach. It looks like a snake and it may varies in color depending on what the person ate. It is called the small intestine due to the diameter size because it is longer in length than the large intestine.



Function

The large intestine is the final section of the gastroinestial tract that performs the vital task absorbing water and the vitamins while converting diggested food into feces although its shorter than the small intestine in length the large intestine is considerbly thicker in diameter. It absorbs essential vitamins produced by gut bacteria and reclaiming water from feces.
The Small intesine: Most absorbtion of the nutients occur in the small intestine. it happens in the small bladder it carries it in continuation with the stomach up to the colon from where the large intestine carries it to the rectum and out of the body.


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