Digestive System

Parts of a digestive system Gullet

Mouth

Small intestine Large intestine

Stomach Anus

2 main function digestive system 1. Breaks down food into simple substances 2. Absorbs the simple food substances so that they can be used by the body

What is digestion?

chew

Broken down

The process where food is chewed or broken down into simple substances in the body.

Starting from

1.

The Mouth

Teeth- Chew and grind food into smaller pieces 2. Saliva- Makes food soft enough to swallow 3. Digestive juices in the saliva helps digest food slightly

Next The Gullet Allows food to move from the mouth down to the stomach. gullet

The muscle action which moves the food down is called peristalsis.

To the Muscular Stomach Food is crushed further and mixed with digestive juices After some time, the food will look like a “thick soup”

The Absorbing Small intestine More digestive juices are added to the food Food substances are so tiny they can pass

through the walls of the intestine.

The Absorbing Small intestine More digestive juices are added to the food Food substances are so tiny they can pass

through the walls of the intestine.

The Water Absorber-

Large intestine This is where the undigested food go! Most of the water is removed from the food here.

Large intestine

The last step-

The Anus The undigested food is passed out of the body as waste through an opening called the anus

The anus

Can you remember what we have learnt?

The digestion of food is completed In the large intestine In the small intestine

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QUIZ TIME! What helps to break the food even further in the stomach? The salivary glands in the stomach helps us to break down the food even further. The gastric juices in the stomach helps us to break down the food even further.

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Undigested food goes to the

Large intestine

Small intestine

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