Digestive System Worksheet: 1. Label The Diagram With The Parts of ... - Free Printable

Let's solve this Digestive System Worksheet step by step. I'll first label the diagram based on the standard human digestive system, and then fill in the blanks in the table with correct answers.

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🔹 Step 1: Label the Diagram

Here is how to label the parts of the digestive system in order from top to bottom (based on the typical diagram):

1. Mouth
2. Esophagus
3. Liver
4. Gallbladder
5. Stomach
6. Pancreas
7. Small intestine
8. Large intestine (Colon)
9. Rectum
10. Anus

> *(Note: The arrows usually indicate the path of food, so follow the flow from mouth → esophagus → stomach → small intestine → large intestine → rectum → anus.)*

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🔹 Step 2: Fill in the Table

Now let’s complete the function table:

| Structure | Function |
|---------------------|--------|
| Mouth | Where food enters the body. Also called ingestion. |
| Salivary glands | Produce saliva that break down starch and lubricate food. |
| Oesophagus | Food travels down here to the stomach. |
| Stomach | Contains gastric juices and hydrochloric acid to break down food and kill bacteria. |
| Small intestine | Where nutrients are absorbed. |
| Large intestine | Where water is absorbed. |
| Rectum | Stores the feces. |
| Anus | Expels waste from the body. |
| Pancreas | Secretes enzymes and bicarbonate into the small intestine. |
| Gall bladder | Stores bile which helps to break down fats. |
| Liver | Produces bile which helps to break down fats. |

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✔ Final Answer Summary:

#### Diagram Labels (from top to bottom):
1. Mouth
2. Esophagus
3. Liver
4. Gallbladder
5. Stomach
6. Pancreas
7. Small intestine
8. Large intestine
9. Rectum
10. Anus

#### Completed Table:

| Structure | Function |
|---------------------|--------|
| Mouth | Where food enters the body. Also called ingestion. |
| Salivary glands | Produce saliva that break down starch and lubricate food. |
| Oesophagus | Food travels down here to the stomach. |
| Stomach | Contains gastric juices and hydrochloric acid to break down food and kill bacteria. |
| Small intestine | Where nutrients are absorbed. |
| Large intestine | Where water is absorbed. |
| Rectum | Stores the feces. |
| Anus | Expels waste from the body. |
| Pancreas | Secretes enzymes and bicarbonate into the small intestine. |
| Gall bladder | Stores bile which helps to break down fats. |
| Liver | Produces bile which helps to break down fats. |

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💡 Explanation of Key Concepts:

- Mouth: Digestion begins here with chewing (mechanical digestion) and saliva (chemical digestion).
- Salivary glands: Produce saliva containing amylase, an enzyme that breaks down starch.
- Esophagus: Muscular tube that moves food via peristalsis to the stomach.
- Stomach: Mixes food with gastric juices; churning breaks it down further; kills microbes with HCl.
- Small intestine: Main site of nutrient absorption; aided by enzymes from pancreas and bile from liver.
- Large intestine: Absorbs water and electrolytes; forms feces.
- Rectum & Anus: Store and expel waste.
- Liver: Produces bile (emulsifies fats), detoxifies substances, and regulates metabolism.
- Gallbladder: Stores and concentrates bile before releasing it into the small intestine.
- Pancreas: Releases digestive enzymes (e.g., lipase, amylase, proteases) and bicarbonate to neutralize stomach acid.

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✔ This worksheet helps students understand both the anatomy and physiology of the digestive system. Let me know if you'd like a printable version or visual guide!