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Physical and Chemical Changes through the Digestive System

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Alanna Apodaca

on 6 March 2013

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Transcript of Physical and Chemical Changes through the Digestive System

Physical and Chemical Changes through the Digestive System At this point the sandwich
is going down the esophagus
and is getting smashed by the muscles in a wave like form. This is a form of Physical Change, and the esophagus is physically sending the food down to the stomach. The sandwich is now in the stomach. The sandwich at this point has now turned into a bolus it is being mixed with chemicals found inside the stomach. The chemicals in the stomach cause a reaction of either breaking down or dissolving the nutrients found within the food.
Due to this, it is both a Physical and Chemical Change. The Digestive System is the function of turning food into the energy you need. Then sending the remains (what your body feels it doesn't need) to the "waste disposal". The food will now flow through the small intestine, and nutrients within the food make contact with the blood vessels which surround the small intestine. Chemical Change The large intestine's functions are to absorb water and to store, process, and to eliminate, what is remaining after water has been reclaimed is known as feces (solid poop). This is a Physical change because it just changes the shape. The rectum is the end of the digestive cycle, which begins at the mouth and includes the esophagus, stomach and small and large intestines. The rectum is about 6 to 8 inches long, and is the final portion of the digestive system leading what is not needed to the anal canal. Physical Change because it is just getting out. Alanna Apodaca Mouth The sandwich will now go through
mastication in the mouth, and will
get mixed with saliva. Due to it getting
mixed with saliva this process will be
a Chemical Change. Esophagus Stomach Small Intestine Large Intestine Rectum Bile is an important player in the digestive system largely because it helps to digest fats.
In the gut, fats exist as relatively large globs that cannot be absorbed. To prepare fats for absorption, they must first be broken down into their component parts. An enzyme called lipase is capable of breaking down the large fat globs.
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