Educational diagram illustrating the anatomy of a bird's digestive system with labeled organs.

Let’s solve this step by step.

We are looking at a diagram of a bird’s digestive system. There are blank boxes pointing to different parts inside the bird’s body. Below, there is a word bank with 10 terms:

- cloaca
- small intestine
- proventriculus
- esophagus
- spleen
- colon
- gizzard
- crop
- gallbladder
- liver

Our job is to match each term to the correct part in the diagram.

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Step 1: Start from the top — where food enters.

Food goes into the beak, then down the esophagus. So the first box near the neck should be “esophagus”.

After the esophagus, birds have a pouch called the crop (stores food). That’s usually a bulge right after the esophagus.

Then comes the proventriculus (glandular stomach) — it secretes acids and enzymes.

Next is the gizzard — muscular stomach that grinds food (often has stones inside).

So along the upper digestive tract:
→ Esophagus → Crop → Proventriculus → Gizzard

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Step 2: After the gizzard, food moves into the small intestine — long coiled tube where most digestion and absorption happens.

Attached to the small intestine are organs like the liver (large organ on the right side), gallbladder (small sac under liver), and spleen (smaller organ nearby).

The colon is shorter than in mammals — it’s the large intestine section before the end.

Finally, waste exits through the cloaca — common exit for digestive, urinary, and reproductive systems.

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Now let’s assign labels based on typical bird anatomy diagrams:

Top left box (neck area): esophagus
Box below that (bulge): crop
Box next to that (first stomach): proventriculus
Box after that (muscular stomach): gizzard
Long coiled tubes in middle: small intestine
Large organ on right side: liver
Small sac under liver: gallbladder
Small oval organ near liver/intestine: spleen
Short tube after small intestine: colon
Very last opening at bottom: cloaca

Wait — we have 10 words and 10 boxes? Let’s count the boxes in the image description.

Actually, looking again — the diagram likely has 10 labeled lines/boxes. We need to make sure every word matches one box.

Let me list them in order as they appear from head to tail:

1. Esophagus (throat)
2. Crop (storage pouch)
3. Proventriculus (true stomach)
4. Gizzard (grinding stomach)
5. Small intestine (long coils)
6. Liver (big organ on right)
7. Gallbladder (under liver)
8. Spleen (near liver/intestine junction)
9. Colon (short segment before cloaca)
10. Cloaca (final opening)

Yes — all 10 fit.

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Final matching (based on standard bird digestive anatomy):

Starting from top-left going down, then across:

Left column (top to bottom):
- Box 1: esophagus
- Box 2: crop
- Box 3: proventriculus
- Box 4: gizzard
- Box 5: small intestine

Right column (top to bottom):
- Box 6: liver
- Box 7: gallbladder
- Box 8: spleen
- Box 9: colon
- Box 10: cloaca

(Note: Depending on exact diagram layout, some positions may vary slightly — but this is the standard labeling.)

Since the user didn’t provide an interactive way to drag/drop, I’ll give the answers in order as typically expected in such worksheets — often numbered or grouped by location.

But since no numbers are given, I will list the correct label for each anatomical position clearly.

Alternatively, if the worksheet expects you to write the name next to each line, here’s how to do it:

Imagine the diagram:

- Line pointing to throat → esophagus
- Line pointing to swollen pouch below throat → crop
- Line pointing to first chamber after crop → proventriculus
- Line pointing to thick-walled chamber after proventriculus → gizzard
- Lines pointing to long winding tubes → small intestine
- Large organ on right side → liver
- Small greenish sac under liver → gallbladder
- Small reddish-brown organ near intestine start → spleen
- Short tube leading to rear → colon
- Final opening at back → cloaca

All matched!

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Final Answer:
esophagus, crop, proventriculus, gizzard, small intestine, liver, gallbladder, spleen, colon, cloaca