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How is a Hamburger Digested?

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Kiana Mcknight

on 13 November 2013

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Transcript of How is a Hamburger Digested?

How is a Hamburger Digested?
If you have ever wondered how the food you eat digests then you have come to the right place :)
How a Hamburger is Digested
By: Kiana Mcknight
To begin, the process starts in your mouth.
Your teeth chew the food which then stimulates the exocrine glands. The exocrine glands release digestive enzymes such as salivary amylase (which helps break down carbohydrates).
Chewing causes the release of saliva!!
Saliva helps condense the food into a Bolus which can be easily passed through the ESOPHAGUS!
Next the food is passed on to the ESOPHAGUS!
The Esophagus is about 20cm long. The food is pushed down by Peristalsis which is a wavelike contraction of smooth muscle tissue.
Diagram of the Esophagus!!
Next the food enters the stomach through the cardiac sphincter.
In the Stomach:
In the stomach the food is churned and mixed with digestive fluid (hydrochloric acid and other digestive enzymes). It decomposes it CHEMICALLY for a few hours. After a few hours the acidic level changes and more enzymes are either activated or deactivated to extract and process various nutrients.
After being processed in the stomach:
The food moves and is passed to the small intestine through peristalsis. It passes through the pyloric sphincter and goes into the first 10 inches of the small intestine which is called the DUODENUM!
In the Duodenum:
The food is mixed with bile (helps in fat digestion), pancreatic juice, and intestinal juice. Bile contains pigments by products of red blood cells that leave with the feces.

These add several enzymes such as maltose, lactose which produce sugars.
Most Nutrient absorption takes place in the small intestine!!
The food passes through the small intestines wall which has villi.
The blood has now absorbed the nutrients and is carried away from the small intestine through the Hepatic Portal Vein to the Liver.
In the liver it is filtered, the toxins are removed, and nutrients are processed.
After the small intestine the food goes into the Large intestine.
The Large intestine has three parts:
- Cecum (pouch that forms t-junction with the small intestine)
- Colon
- Rectum
In the Large Intestine:
The water is reabsorbed. Food that cannot go through the villi (Fiber) can be stored in the large intestine. Fiber helps keep food moving through the G.I Tract.
Food that cannot be broken down is called feces. Feces is stored in the rectum until it is expelled through the Anus.
You have officially digested a Hamburger, Don't forget to wash your hands for 60 seconds with soap when you are finished :D
Thank You :)
Secretion: a process by which substances are produced and discharged from a cell, gland, or organ for a particular function in the organism or for excretion. (can occur in secretory vessels).

CCK is a peptide which is responsible for stimulating the digestion of fat and protein.
Gastrin: A peptide hormone that stimulates secretion of gastric acid. (stomach is involved).
Insulin: A peptide hormone, produced by beta cells of the pancreas, and is central to regulating carbohydrate and fat metabolism in the body.
Glucagon,: A peptide hormone secreted by the pancreas, raises blood glucose levels.
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