Comparing Animal and Plant Cells - Labeling activity showing detailed structures of animal and plant cells with numbered labels for identification.

Here is the labeled solution for the “Comparing Animal and Plants Cells” diagram, with explanations for each organelle:

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1. Cell membrane
*Explanation:* Found in both animal and plant cells, it surrounds the cell and controls what enters and exits. In the animal cell (left), it’s the outermost boundary; in the plant cell (right), it lies just inside the cell wall.

2. Cell wall
*Explanation:* Unique to plant cells (and some other organisms like fungi and bacteria). It provides structural support and protection. Not found in animal cells.

3. Cytoplasm
*Explanation:* The gel-like substance filling the cell, where organelles are suspended. Present in both plant and animal cells.

4. Mitochondrion (plural: mitochondria)
*Explanation:* Known as the “powerhouse of the cell,” it generates energy (ATP) through cellular respiration. Found in both plant and animal cells.

5. Ribosomes
*Explanation:* Small structures that synthesize proteins. They can be free-floating in the cytoplasm or attached to the rough ER. Present in both cell types.

6. Vacuole
*Explanation:* In plant cells, this is a large central vacuole that stores water, ions, and waste, helping maintain turgor pressure. Animal cells have smaller, multiple vacuoles.

7. Nucleus
*Explanation:* Contains the cell’s DNA and controls cellular activities. Surrounded by a nuclear envelope. Found in both plant and animal cells.

8. Nucleolus
*Explanation:* Located inside the nucleus, it produces ribosomes. Present in both cell types.

9. Rough Endoplasmic Reticulum (Rough ER)
*Explanation:* A network of membranes studded with ribosomes; involved in protein synthesis and transport. Found in both plant and animal cells.

10. Smooth Endoplasmic Reticulum (Smooth ER)
*Explanation:* Lacks ribosomes; synthesizes lipids and detoxifies chemicals. Present in both cell types.

11. Golgi Apparatus (Golgi body)
*Explanation:* Modifies, sorts, and packages proteins for secretion or delivery to other organelles. Found in both plant and animal cells.

12. Lysosome
*Explanation:* Contains digestive enzymes to break down waste materials and cellular debris. More common and prominent in animal cells; plant cells may have similar functions in vacuoles or peroxisomes.

*(Note: Some plant cells do contain lysosome-like vesicles, but traditionally they are emphasized more in animal cells.)*

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✔ Summary of Key Differences:

| Organelle | Animal Cell | Plant Cell |
|-------------------|-------------|----------|
| Cell Wall | ✘ | ✔ |
| Large Central Vacuole | ✘ (small vacuoles) | ✔ |
| Chloroplasts | ✘ | ✔ (not labeled here, but usually present) |

*(Chloroplasts are not labeled in this diagram, but would typically be shown in plant cells for photosynthesis.)*

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Final Answer — Labeled List:

1. Cell membrane
2. Cell wall
3. Cytoplasm
4. Mitochondrion
5. Ribosomes
6. Vacuole
7. Nucleus
8. Nucleolus
9. Rough Endoplasmic Reticulum
10. Smooth Endoplasmic Reticulum
11. Golgi Apparatus
12. Lysosome

This labeling correctly identifies all major organelles and highlights key structural differences between plant and animal cells.