The digestive system
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Mr. Harper’s science mini lesson with audio. The Digestive System. What happens to the food we eat. Every part of our bodies is made up of billions of tiny living cells . Every cell needs food for energy or it will die. v.

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The Digestive System

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The digestive system

Mr. Harper’s science mini lesson with audio

TheDigestiveSystem

What happens to the food we eat


The digestive system

Every part of our bodies is made up of billions of tiny living cells. Every cell needs food for energy or it will die.

v

v

v


The digestive system

Cellsget the energy they need from sugar that comes to them in the blood.

Blood in the capillary

Bloodflow in capillary

Sugar molecules

Sugar molecules

cell

cell

cell

cell

cell

cell


The digestive system

The digestive system is a group of organs that process the food we eat and puts sugar into the blood that the cells need for energy to live.

stomach

Small intestine where sugar is put into the blood


The digestive system

The digestive process begins in the mouth. Food is broken into small pieces by the teeth and mixed with saliva (spit) which has chemicals that help with digestion.


The digestive system

Food is chewed up and mixed with saliva in the mouth. When we swallow, it moves down a tube

called the

esophagus.

ee SOF uh gus


The digestive system

The esophagus delivers the food to the stomach, which is a storage bag. Here food is mixed with chemicals, acids and juices that help with digestion.


The digestive system

After it leaves the stomach the food material is very watery, like soup. It moves into the long, folded small intestine. Here is where the sugar and other nutrients are taken out of the food.

stomach

small

intestine


The digestive system

The inside of the small intestine is lined with millions of tiny, finger-like projections called villi (vil eye).

Villi absorb nutrients from our food.

Villi is the plural for villus.

1 villus 2 villi


The digestive system

After the nutrients have been removed in the small intestine, the watery material moves into the large intestine, also called the colon.

Stomach

Small intestine

Large intestine

The large intestine is shorter but bigger around than the small intestine.


The digestive system

Most of the water is removed from the used-up food material in a healthy person’s large intestine.

After that the solid waste (poop) goes into the toilet.


The digestive system

After it leaves the mouth, food passes through the digestive organs in this order:


The digestive system

Let’s review:

After it leaves the mouth the order of the organs that food passes through is

1. Esophagus


The digestive system

Let’s review:

After it leaves the mouth the order of the organs that food passes through is

1. Esophagus

2. Stomach


The digestive system

Let’s review:

After it leaves the mouth the order of the organs that food passes through is

1. Esophagus

2. Stomach

3. Small intestine


The digestive system

Let’s review:

After it leaves the mouth the order of the organs that food passes through is

1. Esophagus

2. Stomach

3. Small intestine

4. Large intestine

also called the colon


The digestive system

./

Now let’s check what you learned.

./


The digestive system

Review question 1

./

What is the main function (job) of your digestive system?


The digestive system

Review question 1

./

The job of our digestive system is get the sugar and nutrients our cells need to live from the food we eat.

Short answer: The digestive system processes the food we eat.


The digestive system

Review question 2

./

./

What is the function of the esophagus?


The digestive system

Review question 2

./

./

The esophagus is atube that transports food from the mouth to the stomach.

food


The digestive system

Review question 3

./

./

What is the job of the stomach?


The digestive system

Review question 3

./

./

The stomach is only a storage bag where food is mixed with acids to get it ready for digestion.


The digestive system

Review question 4

./

./

What happens in the small intestine?


The digestive system

Review question 4

./

./

The small intestine is where food is digested (sugar and other nutrients are removed from food and put into the blood).


The digestive system

Review question 5

./

What happens to food material when it moves out of the small intestine?

./


The digestive system

Review question 5

./

Food material is like a stinky brown soup when it leaves the small intestine. It goes next through the large intestine where most of the water is removed.

./


The digestive system

Review question 6

./

Where does the digestive process begin?

./


The digestive system

Review question 6

./

The digestive process begins in your mouth where food is broken up and mixed with saliva.

./


The digestive system

Review question 7

./

What is the correct order of the digestive system organs that food passes through after it is swallowed?

./


The digestive system

Review question 7

./

1

  • Esophagus

  • Stomach

  • Small intestine

  • Large intestine

  • (also called the

  • colon)

2

3

4

Large intestine


The digestive system

Review question 8

./

./

How does sugar travel from the small intestine to all the cells in your body?


The digestive system

Review question 8

The blood carries sugar from the small intestineto every cell in your body.

Blood in the capillary

Bloodflow in capillary

Sugar molecules

Sugar molecules

cell

cell

cell

cell

cell

cell


The digestive system

There is a good

Brainpopcartoon that can teach you more:

./

  • Digestive system


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