Digestive System Worksheet with Diagram and Fill-in-the-Blank Questions

Let's solve the worksheet titled "The Digestive System" step by step. The goal is to fill in the blanks based on the correct biological processes of digestion.

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Question: What is the main function of the digestive system?

Answer:
The main function of the digestive system is to break down food into nutrients that the body can absorb and use for energy, growth, and cell repair.

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Now, let’s complete the paragraph with the correct terms:

> The digestive system starts in the mouth.
> Food is broken into smaller pieces by chewing with our teeth.
> The food gets mixed with a juice called saliva in the mouth.
> The food then goes through the esophagus to the stomach.
> Here it mixes with the digestive juices.
> Food is then passed into the small intestine.
> Here nutrients from the food are taken in by blood.
> The undigested food passes to the large intestine & finally is thrown out of the body through the rectum and anus.

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✔ Final Completed Worksheet:

What is the main function of the digestive system?
To break down food into nutrients that the body can absorb and use for energy, growth, and cell repair.

Fill in the blanks:

- The digestive system starts in the mouth.
- Food is broken into smaller pieces by chewing with our teeth.
- The food gets mixed with a juice called saliva in the mouth.
- The food then goes through the esophagus to the stomach.
- Here it mixes with the digestive juices.
- Food is then passed into the small intestine.
- Here nutrients from the food are taken in by blood.
- The undigested food passes to the large intestine & finally is thrown out of the body through the rectum and anus.

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🔍 Explanation of Each Step:

1. Mouth: Digestion begins here. Teeth chew food (mechanical digestion), and saliva (containing enzymes like amylase) starts breaking down carbohydrates (chemical digestion).

2. Esophagus: A muscular tube that moves food from the mouth to the stomach via peristalsis (muscle contractions).

3. Stomach: Food mixes with gastric juices (including hydrochloric acid and pepsin) to further break it down into a semi-liquid form called chyme.

4. Small Intestine: Most nutrient absorption occurs here. The walls of the small intestine have tiny finger-like projections called villi that increase surface area for absorption into the bloodstream.

5. Large Intestine: Absorbs water and electrolytes from the remaining indigestible food matter, forming feces.

6. Rectum and Anus: Store and eliminate waste from the body.

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This completes the digestive process! 🍽️🔬