Animal Cell Diagram Worksheet for Educational Use

Let's solve this step-by-step.

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Step 1: Label the Animal Cell Diagram

We are given a diagram of an animal cell with numbered parts (1–11). We need to identify each part based on its appearance and location in the cell. Here’s how we can match them:

#### Identifying the Structures (1–11):

1. Mitochondrion – The oval-shaped organelle with folded inner membrane (cristae). There are several of these.
2. Ribosome – Small dots scattered in the cytoplasm and on the rough ER.
3. Golgi apparatus – Stack of flattened sacs, often near the nucleus.
4. Lysosome – Small, oval-shaped vesicles (note: the hint says lysosomes are oval).
5. Vacuole – A rounded structure (smaller than in plant cells), often one or two in animal cells.
6. Endoplasmic reticulum (ER) – Network of membranes; rough ER has ribosomes attached, smooth ER does not.
7. Cell membrane – Outer boundary of the cell.
8. Nuclear envelope – Double membrane surrounding the nucleus.
9. Nucleus – Large central structure containing genetic material.
10. Nucleolus – Dark spot inside the nucleus.
11. Cytoskeleton – Network of fibers (microtubules, microfilaments) supporting cell shape.

Now, let’s assign the labels:

| Number | Structure |
|--------|-----------------------|
| 1 | Mitochondria |
| 2 | Ribosomes |
| 3 | Golgi body |
| 4 | Lysosome |
| 5 | Vacuole |
| 6 | Endoplasmic reticulum |
| 7 | Cell membrane |
| 8 | Nuclear envelope |
| 9 | Nucleus |
| 10 | Nucleolus |
| 11 | Cytoskeleton |

> Note: In the diagram, #6 appears to be rough endoplasmic reticulum (since it has ribosomes on it), and #3 is clearly the Golgi apparatus.

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Step 2: Fill in the Functions Table

Now, fill in the functions for each labeled cell part.

| Cell Part | Function of Cell Part |
|------------------------|------------------------|
| 12. nucleus | Contains DNA and controls cell activities (e.g., gene expression, reproduction). |
| 13. endoplasmic reticulum | Network of membranes involved in protein and lipid synthesis. Rough ER has ribosomes and makes proteins; smooth ER synthesizes lipids and detoxifies substances. |
| 14. ribosome | Site of protein synthesis (translation of mRNA into proteins). |
| 15. cytoplasm | Gel-like substance that fills the cell and supports organelles; site of many metabolic reactions. |
| 16. nucleolus | Produces ribosomal subunits (ribosome assembly). |
| 17. Golgi body | Modifies, sorts, packages, and distributes proteins and lipids to their destinations. |
| 18. cell membrane | Regulates what enters and exits the cell; maintains homeostasis; involved in cell signaling. |
| 19. cytoskeleton | Provides structural support, maintains cell shape, enables movement (e.g., via microtubules and microfilaments), and aids in intracellular transport. |
| 20. lysosome | Contains digestive enzymes to break down waste materials, foreign substances, and damaged organelles (cellular digestion). |
| 21. mitochondria | Site of cellular respiration; produces ATP (energy) for the cell. |
| 22. vacuole | Stores water, ions, nutrients, and waste products; helps maintain turgor pressure (though smaller in animal cells than in plants). |

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✔ Final Answer Summary

#### Labels (1–11):
1. Mitochondria
2. Ribosomes
3. Golgi body
4. Lysosome
5. Vacuole
6. Endoplasmic reticulum
7. Cell membrane
8. Nuclear envelope
9. Nucleus
10. Nucleolus
11. Cytoskeleton

#### Functions Table:

| Cell Part | Function of Cell Part |
|------------------------|------------------------|
| 12. nucleus | Controls cell activities and stores genetic material. |
| 13. endoplasmic reticulum | Synthesizes proteins (rough ER) and lipids (smooth ER). |
| 14. ribosome | Synthesizes proteins. |
| 15. cytoplasm | Medium for biochemical reactions and holds organelles. |
| 16. nucleolus | Produces ribosomal subunits. |
| 17. Golgi body | Modifies, sorts, and packages proteins and lipids. |
| 18. cell membrane | Regulates passage of substances in and out of the cell. |
| 19. cytoskeleton | Supports cell structure and enables movement. |
| 20. lysosome | Digests waste and foreign materials. |
| 21. mitochondria | Produces energy (ATP) through cellular respiration. |
| 22. vacuole | Stores materials and helps maintain internal balance. |

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This completes the worksheet! Let me know if you'd like a printable version or image annotations.