"Where has the food gone" PPT courseware

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"Where has the food gone" PPT courseware

Part One: Digestive System

Digestive tract: oral cavity → pharynx → esophagus → stomach → small intestine → large intestine → anus

digestive glands

External digestive glands: liver, pancreas

Internal digestive glands: intestinal glands, gastric glands, salivary glands

The functions of various digestive tract organs

Salivary glands secrete saliva into the food in the mouth and help swallow the food

Gastric gland secretes gastric juice into the stomach and participates in gastric digestion

Intestinal glands secrete intestinal juice into the small intestine and participate in digestion in the small intestine

gland liver secretes bile into the small intestine and detoxifies

Pancreas secretes pancreatic juice into the small intestine and participates in digestion in the small intestine

Where does the food go PPT, part 2: How is food digested?

Answer: Digestion of food,

The food is crushed by chewing with teeth and peristalsis of the stomach.

Second, food is turned into absorbable components with the help of digestive juices such as saliva, gastric juice, intestinal juice, bile, and pancreatic juice.

How did you explore “how food is digested”?

Answer: Take two test tubes, add equal amounts of starch to each, add a small amount of saliva to one of them, and shake well. Put the two test tubes into warm water around 37°C. After a while, add a drop of iodine to the two test tubes respectively. What you observe is that only the starch without saliva turns blue. This phenomenon shows that saliva can decompose starch into maltose.

Where does the food go PPT, part 3: How to protect digestive organs?

Data card: Nutrients such as protein, fat, and starch in food are constantly decomposed and "burned" in the human body, while producing carbon dioxide, water, urea, etc. They and undigested food residues are excreted from the body through breathing, perspiration, defecation and other channels.

How to protect digestive organs?

answer:

1. Not partial to eclipse

2. Eat regularly and quantitatively, chew slowly and avoid overeating.

3. Don’t eat rotten and spoiled food, and don’t be greedy for raw, cold, spicy and irritating food.

4. Have a regular daily life and defecate regularly.

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:

"Where Does the Food Go?" PPT Part One Content: Digestive System Mouth In the head of the human body, there are 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. ..

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Update Time: 2024-09-13

This template belongs to science courseware Qingdao Edition Fifth Grade Science Volume 1 industry PPT template

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