An educational worksheet featuring a diagram of the human digestive system for labeling and completing sentences about digestion.

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 arrows pointing to different organs. We need to match the correct labels from the list:

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

Now, let’s identify each part based on its position in the diagram:

1. Top left arrow (mouth) → The opening where food enters.
2. Second arrow down (oesophagus) → The tube going from mouth to stomach.
3. Third arrow (stomach) → The J-shaped organ below the esophagus.
4. Fourth arrow (liver) → The large organ above the stomach, on the right side.
5. Fifth arrow (pancreas) → The small organ behind the stomach, near the duodenum.
6. Sixth arrow (small intestine) → The coiled yellow tube beneath the stomach.
7. Seventh arrow (large intestine) → The wider tube surrounding the small intestine.
8. Bottom arrow (anus) → The opening at the end of the digestive tract.

#### ✔ Correct Labels:
From top to bottom on the left side:
- Mouth
- Oesophagus
- Stomach
- Liver

On the right side, from top to bottom:
- Pancreas
- Small intestine
- Large intestine
- Anus

> Note: The pancreas is often shown just behind the stomach and connected to the small intestine.

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2. Complete the sentences with the words given

We’ll use the same vocabulary: Mouth, Oesophagus, Stomach, Liver, Pancreas, Small intestine, Large intestine, Anus

a) The ________ is a long tube that pushes the food into the stomach.
→ Oesophagus
*(It transports food from the mouth to the stomach via peristalsis.)*

b) The ________ is where the digestive process starts.
→ Mouth
*(Chewing and saliva begin digestion here.)*

c) The ________ is like a mixer and it breaks food down into very small pieces.
→ Stomach
*(Muscular contractions mix food with gastric juices.)*

d) The ___________ produce juices that help to transform food into nutrients in the small intestine.
→ Liver and Pancreas
*(But only one blank — so we need to pick the best fit. Both produce digestive juices: liver makes bile, pancreas makes pancreatic juice. Since both are listed, but only one blank, likely intended answer is "Liver and Pancreas" or possibly just "Pancreas". However, since it says “produce” (plural), it implies more than one. But if only one word fits, then “Pancreas” is most accurate for enzyme production. But let's see...)*

Wait — the sentence says "produce" (plural verb), so it should be plural noun.

So possible answer: Liver and pancreas — but the blank is singular.

Alternatively, maybe the question expects pancreas as the main source of digestive enzymes, or liver for bile.

But actually, both contribute. However, in many textbooks, pancreas is highlighted for producing digestive juices that enter the small intestine.

But liver produces bile, which helps digest fats — also important.

But since the sentence says "produce", plural, and there’s only one blank, perhaps the intended answer is liver and pancreas together?

But the blank is single. So this may be a mistake in wording.

Looking again: "The ___________ produce juices..." → This suggests a plural subject.

So the correct answer must be a plural noun.

But in the word list, all are singular.

So likely, the intended answer is liver and pancreas, even though it's two words.

But since we have to choose from the list, and the sentence uses "produce", perhaps the best fit is:

→ Liver and pancreas (even if two words)

But if only one word can go, then pancreas is better because it directly secretes enzymes into the small intestine.

However, liver also contributes (via bile).

But the pancreas produces pancreatic juice containing enzymes that break down carbohydrates, proteins, and fats.

So, pancreas is the primary organ producing digestive juices for the small intestine.

But liver produces bile, stored in gallbladder, released into small intestine.

So both are involved.

But since the sentence says "produce", and only one blank, perhaps the expected answer is:

→ Pancreas (commonly taught as the main source)

Alternatively, maybe the question allows combining two words.

But looking at the structure, likely the answer is:

→ Pancreas (most direct)

But wait — the sentence says "produce", so plural.

So maybe the intended answer is liver and pancreas, but that's not one word.

Hmm.

Perhaps the word list includes "liver" and "pancreas", but we can use both.

But the blank is one line.

So unless the instruction allows multiple words, this might be an error.

But in many such worksheets, they accept "liver and pancreas" even if it's two words.

So I think the best answer is:

→ Liver and pancreas

But if only one word is allowed, then pancreas is best.

Let’s check standard answers.

Actually, both liver and pancreas produce substances that aid digestion in the small intestine.

So:

→ Liver and pancreas

But since the blank is singular, and the word list has singulars, perhaps the question meant to say “the _____ produces” — but it says “produce”.

So either way, liver and pancreas is the correct biological answer.

e) The _________ separates the nutrients from the waste.
→ Large intestine
*(It absorbs water and electrolytes, forming solid waste; the small intestine absorbs nutrients, but the large intestine processes the remaining material.)*

Wait — actually, small intestine absorbs nutrients, large intestine absorbs water and forms feces.

So "separates nutrients from waste" — this is a bit ambiguous.

But:

- Small intestine: absorbs nutrients → so separates nutrients from undigested matter.
- Large intestine: absorbs water, compacts waste.

So small intestine is where most nutrient absorption happens — it separates nutrients from indigestible waste.

So small intestine is better.

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

Yes — the small intestine absorbs nutrients, leaving waste for the large intestine.

So:

→ Small intestine

But earlier, d) said about producing juices — that’s pancreas and liver.

Let’s finalize:

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✔ Final Answers:

#### 1. Labeling:

From top to bottom:

- Left side (from top):
1. Mouth
2. Oesophagus
3. Stomach
4. Liver

- Right side (from top):
1. Pancreas
2. Small intestine
3. Large intestine
4. Anus

#### 2. Sentence Completion:

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 liver and pancreas produce juices that help to transform food into nutrients in the small intestine.
e) The small intestine separates the nutrients from the waste.

> Note: For (d), if only one word is allowed, pancreas is acceptable, but liver and pancreas is more accurate. If the worksheet expects a single word, pancreas is the best choice due to enzyme production.

But since the verb is "produce", plural, and no other plural option exists, "liver and pancreas" is the correct answer.

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✔ Summary Answer:

1. Labels:

- Top left: Mouth
- Middle left: Oesophagus
- Lower left: Stomach
- Bottom left: Liver
- Top right: Pancreas
- Middle right: Small intestine
- Lower right: Large intestine
- Bottom right: Anus

2. Sentences:

a) oesophagus
b) mouth
c) stomach
d) liver and pancreas
e) small intestine

Let me know if you'd like a printable version or image annotation!