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The Stomach

Detailed presentation on the form and function of the stomach.
by

Josh Hamilton

on 11 April 2013

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Transcript of The Stomach

Why The Stomach? Can the Human Body Function without the Stomach? As Chyme begins to enter the Duodenum intestinal gastrin is released to stimulate a small amount of HCl secretions which work on the chyme which has not reached the small intestine.
The small intestine secretes CCK into the blood stream when it begins to fill shutting off all gastric secretions. Intestinal Phases As masticated food enters the stomach from the esophagus through the Cardiac Sphincter,
This triggers the release of gastrin from G cells which subsequently induces parietal cells to excrete HCl. Histamine is also released, stimulating the excretion of more HCL.
Gastric cells add pepsinogen to the mix, which becomes pepsin in the presence of HCl. Pepsin is an enzyme which brakes down protiens into cell-usable amino acids.
As pH levels near 3 gastric secretions begin to slow down; by the time pH reaches 1.5 the release of gastrin in stopped. Gastric Phase Mental stimuli triggers the parasympathetic nervous system to begin 30% - 50% of stomach secretions.

Example: The smell of dinner signals to your brain that food will soon enter your stomach. Cephalic Phase Second step in digestive system
Churns masticated food into chyme
HCl and peptin break down food into usable carbohydrates and amino acids.
Chyme at 2 pH the exits through the Pyloric Sphincter into the small intestine. Functions Digestive Department The most dilated part of the digestive tube, and master of our eating habits. The Stomach Food cannot be used for energy or cellular development without it.
Food intake would be unrealistically limited if it were not for the space provided by the stomach.

If the stomach is terminated, the Body will become incapable of energy synthesis. No: No other organ can provide the digestive functions of the stomach. This would leave a body devoid of any means of utilizion non-injection sustenance.
http://faculty.stcc.edu/AandP/AP/AP2pages/Units24to26/digestion/control.htm
http://en.wikipedia.org/wiki/Pepsin
http://en.wikipedia.org/wiki/Histamine#Storage_and_release
http://www.wisegeek.com/what-is-chyme.htm
http://www.bartleby.com/107/ The Digestive Department breaks down food into it's component parts, so that these parts can be used in the body's cells.
After mastication, food is transported to the stomach via the esophagus. Food is separated out into an acidic mix of amino acids and carbohydrates called chyme.
Chyme is sent through the Small Intestine which processes the nutrients found in chyme, and puts them in the blood stream for cellular use.
The large intestine excretes the waste of this process. Power Producers Longitudinal Circular Oblique Serous Areolar or Submucosa Mucosa Rugae Cardiac Sphincter Incisura Angularis Fundus Body Pyloric Antrum Pyloric Sphincter Duodenum Fun Facts
Stomach fulness signals to the brain to stop eating.
Stomachs were used for liquid storage by early peoples. This is what lead to the invention of cheese.
Has to produce new mucous coat every two weeks. @JoshuaBHamilton
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