Cross-sections of an animal cell and a plant cell for educational comparison.

The task is to label the parts of an animal cell and a plant cell. Below, I will provide the labels for each part of the cells as shown in the image.

Cross-Section of an Animal Cell

1. Nucleus: The control center of the cell, containing DNA.
2. Nuclear Membrane (Nuclear Envelope): Surrounds the nucleus and controls the movement of substances in and out.
3. Nucleolus: A dense region within the nucleus where ribosomes are assembled.
4. Endoplasmic Reticulum (ER):
- Rough ER: Covered with ribosomes; involved in protein synthesis.
- Smooth ER: Lacks ribosomes; involved in lipid synthesis and detoxification.
5. Ribosomes: Small structures where proteins are synthesized.
6. Golgi Apparatus (Golgi Body): Modifies, sorts, and packages proteins and lipids for secretion or use within the cell.
7. Lysosomes: Contain digestive enzymes that break down waste materials and cellular debris.
8. Mitochondria: The powerhouse of the cell; produces energy (ATP) through cellular respiration.
9. Vacuole: Stores nutrients, waste products, and other substances; smaller in animal cells compared to plant cells.
10. Cytoplasm: The gel-like substance inside the cell membrane where organelles are suspended.
11. Cell Membrane: The outer boundary of the cell, regulating what enters and exits the cell.
12. Centrioles: Involved in cell division (mitosis); found in animal cells but not in plant cells.

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Cross-Section of a Plant Cell

1. Cell Wall: A rigid layer outside the cell membrane, providing structural support and protection.
2. Chloroplasts: Organelles containing chlorophyll, where photosynthesis occurs.
3. Nucleus: The control center of the cell, containing DNA.
4. Nuclear Membrane (Nuclear Envelope): Surrounds the nucleus and controls the movement of substances in and out.
5. Nucleolus: A dense region within the nucleus where ribosomes are assembled.
6. Endoplasmic Reticulum (ER):
- Rough ER: Covered with ribosomes; involved in protein synthesis.
- Smooth ER: Lacks ribosomes; involved in lipid synthesis and detoxification.
7. Ribosomes: Small structures where proteins are synthesized.
8. Golgi Apparatus (Golgi Body): Modifies, sorts, and packages proteins and lipids for secretion or use within the cell.
9. Lysosomes: Contain digestive enzymes that break down waste materials and cellular debris.
10. Mitochondria: The powerhouse of the cell; produces energy (ATP) through cellular respiration.
11. Vacuole: Large central vacuole in plant cells that stores nutrients, waste products, and helps maintain turgor pressure.
12. Cytoplasm: The gel-like substance inside the cell membrane where organelles are suspended.
13. Cell Membrane: The outer boundary of the cell, regulating what enters and exits the cell.

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Key Differences Between Plant and Animal Cells

- Plant Cells have a cell wall, chloroplasts, and a large central vacuole.
- Animal Cells lack a cell wall and chloroplasts but have centrioles.

Final Answer

Here are the labeled parts for both diagrams:

#### Animal Cell
1. Nucleus
2. Nuclear Membrane
3. Nucleolus
4. Rough Endoplasmic Reticulum
5. Ribosomes
6. Golgi Apparatus
7. Lysosomes
8. Mitochondria
9. Vacuole
10. Cytoplasm
11. Cell Membrane
12. Centrioles

#### Plant Cell
1. Cell Wall
2. Chloroplasts
3. Nucleus
4. Nuclear Membrane
5. Nucleolus
6. Rough Endoplasmic Reticulum
7. Ribosomes
8. Golgi Apparatus
9. Lysosomes
10. Mitochondria
11. Vacuole
12. Cytoplasm
13. Cell Membrane

Boxed Final Answer:
\boxed{
\text{Labels provided above for both animal and plant cells.}
}