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Authoritative PPT Summary
"Where has the food gone" PPT
Part One: Digestive System
The oral cavity is located in the head of the human body and contains openings for teeth, tongue and glands that secrete saliva.
The esophagus is a tube in the chest that carries food.
The stomach is in the upper left abdomen, like a big bag.
The liver is in the right upper quadrant and secretes bile that reaches the small intestine.
The pancreas is located behind the stomach and secretes pancreatic juice.
The small intestine is located in the lower abdomen, thin and long, about 5 to 6 meters long.
Large Intestine Surrounding the small intestine, it ends with the anus, which is the outlet for feces.
Where does food go PPT, part 2: digestive route
The journey of food in the body:
Oral cavity→esophagus→stomach→small intestine→large intestine
Food enters the mouth, is initially digested, and enters the stomach through the esophagus, where gastric juice digests proteins. Small intestinal juice, bile, and pancreatic juice digest protein, starch, and fat in chyme. The villi of the small intestine absorb nutrients, enter the bloodstream, and transport them throughout the body.
Food residue forms feces in the large intestine and is expelled from the body through the anus.
Where does the food go PPT, Part 3: After-class exercises
1. Let me fill it in:
(1) There is _____ near the human mouth, which can secrete saliva. There is an enzyme in saliva that promotes food digestion and can break down starch into maltose.
(2) The food that people eat contains nutrients such as _____, _____, and _____. After digestion by the human body, they decompose into materials that can be used for human growth and tissue repair, and at the same time provide _____ required for human life activities.
2. Chew the steamed bun or bread slowly, carefully appreciate the changes that occur in your mouth, and write down your feelings.
3. How to protect our digestive organs?
Keywords: Qingdao version fifth grade science PPT courseware free download, where has the food gone PPT download, .PPT format;
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"Where has the food gone" PPT courseware:
Contents of the first part of the PPT courseware "Where Does Food Go": Digestive system Digestive tract: Oral cavity Pharyngeal esophagus Stomach Small intestine Large intestine Anus Digestive glands External digestive glands: Liver, pancreas Intradigestive glands: Intestinal glands, gastric glands, salivary glands The functions of each digestive tract organ Salivary glands...