The digestive system online activity - Free Printable

Let's solve the problem step by step.

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1. Label the digestive system parts

We are given a diagram of the human digestive system with blank labels (yellow boxes) pointing to different organs. We need to match each label from the list:

List of organs:
- Small intestine
- Large intestine
- Mouth
- Oesophagus
- Stomach
- Anus
- Liver
- Pancreas

Now, let’s identify where each part is located in the diagram based on standard anatomy:

#### From top to bottom (left side):
1. Mouth – The opening at the top where food enters.
2. Oesophagus – The tube going down from the mouth to the stomach.
3. Stomach – The J-shaped organ below the oesophagus.
4. Liver – Located above the stomach, on the right side (in the diagram, it’s shown as a red organ).
5. Pancreas – A long gland behind the stomach, often shown near the small intestine.
6. Small intestine – Coiled tube below the stomach and pancreas.
7. Large intestine – The wider tube surrounding the small intestine.
8. Anus – The opening at the end of the digestive tract.

But note: In the diagram, there are 8 yellow boxes — 4 on the left and 4 on the right.

Let’s assign them correctly based on the arrows:

#### Left-side labels (from top to bottom):
1. Mouth → Top left arrow pointing to mouth.
2. Oesophagus → Arrow pointing down from mouth to stomach.
3. Stomach → Arrow pointing to the red J-shaped organ.
4. Liver → Arrow pointing to the green organ (liver) on the upper right side (but labeled on the left side? Wait — check placement.)

Wait — actually, the liver is on the right side of the body, but in the diagram, the labels are positioned around the figure. Let’s look carefully.

Looking at the diagram:
- The mouth is at the top, so first box on the left is Mouth.
- Then, the oesophagus goes down from mouth to stomach.
- Then, the stomach is the large red organ.
- Below that, the pancreas is shown (small green organ behind stomach).
- On the right side, we have:
- Liver — the large organ above the stomach, on the right.
- Pancreas — below the liver, behind the stomach.
- Small intestine — coiled yellow tube.
- Large intestine — surrounding the small intestine.
- Anus — at the bottom.

So now, matching the arrows:

#### Labeling the boxes:

Left side (top to bottom):
1. Mouth → points to mouth
2. Oesophagus → points to the tube from mouth to stomach
3. Stomach → points to the red organ
4. Pancreas → points to the green organ near stomach

Right side (top to bottom):
1. Liver → points to the large organ on the upper right
2. Small intestine → points to the coiled yellow tube
3. Large intestine → points to the outer tube around small intestine
4. Anus → points to the bottom exit

✔ So the correct labeling is:

| Left Side | Right Side |
|----------|------------|
| Mouth | Liver |
| Oesophagus | Small intestine |
| Stomach | Large intestine |
| Pancreas | Anus |

Wait — this doesn't align perfectly with the number of boxes.

Actually, looking at the image again: There are 4 boxes on the left and 4 on the right, total 8.

Let’s count the arrows:

- One arrow from mouth → Mouth (left)
- One from oesophagus → Oesophagus (left)
- One to stomach → Stomach (left)
- One to pancreas → Pancreas (left)

Then on the right:
- Arrow to liver → Liver (right)
- Arrow to small intestine → Small intestine (right)
- Arrow to large intestine → Large intestine (right)
- Arrow to anus → Anus (right)

So yes:

✔ Final Answer for Part 1:

Left side (top to bottom):
1. Mouth
2. Oesophagus
3. Stomach
4. Pancreas

Right side (top to bottom):
1. Liver
2. Small intestine
3. Large intestine
4. Anus

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2. Complete the sentences

Given words:
(We can use the same list: Mouth, Oesophagus, Stomach, Liver, Pancreas, Small intestine, Large intestine, Anus)

a) The oesophagus is a long tube that pushes the food into the stomach.
→ Correct: Food travels down the oesophagus via peristalsis.

b) The mouth is where the digestive process starts.
→ Correct: Chewing and saliva begin digestion.

c) The stomach is like a mixer and it breaks food down into very small pieces.
→ Correct: The stomach churns food with gastric juices.

d) The liver and pancreas produce juices that help to transform food into nutrients in the small intestine.
→ Note: Both liver (bile) and pancreas (digestive enzymes) aid digestion in the small intestine. But since only one blank, maybe they expect "liver and pancreas" or just one?

But the sentence says “the _________” — singular. However, both contribute. But in many such questions, they may expect pancreas because it directly secretes enzymes into the small intestine.

But liver produces bile, which helps digest fats.

But technically, both are correct. However, since the sentence uses “produce juices” (plural), and both do, perhaps:

→ Best answer: liver and pancreas — but if only one word allowed, then pancreas is more direct.

But wait — the instruction says: “Complete the sentences with the words given.” And the words are listed individually.

But in some versions, multiple organs can be used.

Alternatively, if only one word is expected, pancreas is most accurate because it produces pancreatic juice that directly enters the small intestine.

But liver produces bile, which also helps in the small intestine.

So better to say: liver and pancreas

But if only one blank, maybe the intended answer is pancreas.

Wait — let’s see the exact wording:
"d) The ___________ produce juices..." → verb is produce (plural), so subject should be plural.

So: The liver and pancreas produce...

But the blank is singular: "The ________ produce..." → this implies a plural noun.

So likely, the blank is meant to be filled with a plural noun.

But none of the options are plural.

Wait — the list includes:
Small intestine, Large intestine, Mouth, Oesophagus, Stomach, Anus, Liver, Pancreas — all singular.

But the sentence says: "The ________ produce..." → so we need a plural noun.

But all given are singular.

This suggests a possible error in the question.

Alternatively, maybe it's expecting liver and pancreas, even though not in the list.

But since only single words are given, perhaps it's a mistake.

Alternatively, maybe it's pancreas, and the verb is misused.

But "pancreas" is singular, so "produces", not "produce".

So the sentence must be:
"The liver and pancreas produce juices..."

But since those are two separate organs, and the blank is one, perhaps the intended answer is pancreas, and the verb should be "produces".

But it says "produce" — so likely, the answer is liver and pancreas, even if not in the list.

But the instructions say: “complete the sentences with the words given.”

So we must pick from the list.

But none of the words are plural.

So perhaps the intended answer is pancreas, and the verb is incorrect.

Or maybe it's liver.

But liver produces bile, and pancreas produces pancreatic juice — both are important.

But let’s look at common curricula: Often, the pancreas is emphasized for producing digestive juices into the small intestine.

Also, the liver produces bile, which is stored in the gallbladder and released into the small intestine.

So both are correct.

But since only one blank, and the verb is "produce" (plural), the best fit might be liver and pancreas, but that's not in the list.

Alternatively, perhaps the question has a typo.

But let’s assume that pancreas is the intended answer, and accept the verb issue.

But wait — maybe the sentence is:
"The pancreas produces juices..." — but it says "produce".

So inconsistency.

Alternatively, maybe the blank is meant to be filled with liver and pancreas, but since not in list, perhaps the question expects pancreas.

But let’s move on.

e) The large intestine separates the nutrients from the waste.
→ Actually, the small intestine absorbs nutrients, and the large intestine absorbs water and forms feces. So it separates water from waste, but not nutrients.

Wait: Nutrients are absorbed in the small intestine.

So the large intestine mainly absorbs water and electrolytes, forming solid waste.

So the separation of nutrients from waste happens mostly in the small intestine.

But the sentence says: "separates the nutrients from the waste."

That is more accurately done by the small intestine — it absorbs nutrients, leaving waste.

But the large intestine deals with the remaining waste, absorbing water.

So better answer: small intestine

But let’s re-read: "separates the nutrients from the waste."

Yes — the small intestine is where nutrients are absorbed (separated from waste).

The large intestine does not absorb nutrients — it absorbs water.

So the correct answer is small intestine.

But let’s confirm:

- Small intestine: absorption of nutrients → separates nutrients from waste.
- Large intestine: absorbs water, forms feces.

So e) The small intestine separates the nutrients from the waste.

But wait — is that accurate?

Actually, the small intestine absorbs nutrients; the waste is what remains.

So yes, it effectively separates nutrients from waste.

The large intestine processes the waste, but doesn’t separate nutrients — nutrients are already absorbed.

So e) → small intestine

Now back to d):

d) The ___________ produce juices that help to transform food into nutrients in the small intestine.

- Liver → produces bile → helps digest fats in small intestine.
- Pancreas → produces pancreatic juice (enzymes) → digests carbs, proteins, fats in small intestine.

So both contribute.

But the sentence uses “produce” (plural), so plural subject.

But no plural word in list.

Possibility: The question allows using two words? But it says “the words given” — singular.

Perhaps it's a mistake.

But in many similar worksheets, the answer is pancreas.

But liver also contributes.

Alternatively, maybe the answer is liver and pancreas, but not in the list.

But since we must choose from the list, and the verb is “produce”, maybe the intended answer is pancreas, and the verb is wrong.

But let’s see what makes sense.

Another idea: liver produces bile, which helps in fat digestion in the small intestine.

Pancreas produces enzymes.

So both.

But perhaps the expected answer is pancreas, as it produces multiple digestive enzymes.

But liver is also key.

However, in many simplified models, pancreas is highlighted.

But let’s go with logic.

Wait — the liver produces bile, which is stored in the gallbladder and released into the duodenum (part of small intestine). So yes.

But the pancreas directly releases enzymes into the duodenum.

So both are correct.

But since the sentence says “produce” (plural), and we need one word, perhaps it's liver and pancreas, but not in list.

Alternatively, maybe the question has a typo and should be “produces”.

Then pancreas would work.

But let’s assume that the intended answer is pancreas, even with verb issue.

But let’s check online or standard knowledge.

In most biology texts, both liver and pancreas contribute to digestion in the small intestine.

But for this level, perhaps pancreas is sufficient.

But let’s see option e again.

e) The _______ separates the nutrients from the waste.

As discussed, small intestine absorbs nutrients, so it separates them from waste.

Large intestine does not absorb nutrients.

So small intestine is correct.

But wait — the large intestine absorbs water, so it concentrates waste, but doesn’t separate nutrients — nutrients are already gone.

So small intestine is correct.

But let’s double-check:

- After stomach, food goes to small intestine.
- In small intestine: nutrients are absorbed → separated from waste.
- Waste goes to large intestine → water absorbed → feces formed.

So yes, small intestine is where separation occurs.

Therefore, e) → small intestine

Now back to d):

d) The _________ produce juices that help to transform food into nutrients in the small intestine.

Best answer: liver and pancreas

But since not in list, and we must pick from given, perhaps the question intends pancreas.

But liver is also essential.

Alternatively, maybe the answer is liver, but liver produces bile, which emulsifies fats, but doesn’t break down food into nutrients — enzymes do.

Pancreas produces enzymes that break down food into nutrients.

So pancreas is more accurate.

Liver produces bile, which aids digestion, but doesn't produce digestive enzymes.

So pancreas is the primary source of digestive juices.

Thus, d) → pancreas

Even though verb is "produce" (plural), perhaps it's accepted.

Alternatively, maybe the sentence is meant to be “produces”.

But as written, we’ll go with pancreas.

But let’s see if any other word fits.

No.

So final answers:

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✔ Final Answers:

#### Part 1: Labeling

Left side (top to bottom):
1. Mouth
2. Oesophagus
3. Stomach
4. Pancreas

Right side (top to bottom):
1. Liver
2. Small intestine
3. Large intestine
4. Anus

#### Part 2: Fill in the blanks

a) The oesophagus is a long tube that pushes the food into the stomach.
b) The mouth is where the digestive process starts.
c) The stomach is like a mixer and it breaks food down into very small pieces.
d) The pancreas produce juices that help to transform food into nutrients in the small intestine.
*(Note: Grammatically, "pancreas" should be "produces", but "produce" may be a typo.)*
e) The small intestine separates the nutrients from the waste.

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🔍 Explanation:

- Mouth: Begins digestion with chewing and saliva.
- Oesophagus: Transports food to stomach via peristalsis.
- Stomach: Mixes food with gastric juices.
- Liver: Produces bile for fat digestion.
- Pancreas: Produces enzymes and bicarbonate for digestion.
- Small intestine: Main site of nutrient absorption.
- Large intestine: Absorbs water, forms feces.
- Anus: Exit point for waste.

For d), although liver also contributes, the pancreas is the main source of digestive enzymes that break down food into nutrients.

For e), the small intestine absorbs nutrients, thus separating them from undigested waste.

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✔ Final Answer Summary:

1. Labels:
- Left: Mouth, Oesophagus, Stomach, Pancreas
- Right: Liver, Small intestine, Large intestine, Anus

2. Sentences:
a) oesophagus
b) mouth
c) stomach
d) pancreas
e) small intestine