This image is a labeled diagram of an
animal cell, commonly used in biology education. The task is to identify the numbered organelles and write their names in the corresponding blanks on the left.
Let’s go through each number and identify the correct organelle:
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1. Nucleus
- The large, central structure with a dark dot (nucleolus) inside.
- Controls cell activities and stores DNA.
2. Nuclear envelope (or nuclear membrane)
- The double membrane surrounding the nucleus.
- Regulates the passage of materials in and out of the nucleus.
3. Nucleolus
- The small, dense structure inside the nucleus.
- Involved in ribosome production.
4. Rough Endoplasmic Reticulum (RER)
- Network of membranes with ribosomes attached (look like stacked lines with dots).
- Site of protein synthesis.
5. Smooth Endoplasmic Reticulum (SER)
- Network of membranes without ribosomes (smooth appearance).
- Involved in lipid synthesis and detoxification.
6. Mitochondrion
- Double-membraned organelle with inner folds (cristae).
- Known as the "powerhouse" of the cell; produces ATP via cellular respiration.
7. Golgi apparatus
- Stack of flattened sacs.
- Modifies, sorts, and packages proteins and lipids for transport.
8. Lysosome
- Small, spherical vesicle.
- Contains digestive enzymes to break down waste materials.
9. Cytoskeleton (microfilaments or microtubules)
- Network of fibers providing structural support and aiding movement.
- Includes actin filaments and microtubules.
10. Centrioles
- Two perpendicular cylindrical structures.
- Help organize the spindle fibers during cell division.
11. Ribosomes
- Small granular structures (dots), some free in cytoplasm, others attached to RER.
- Site of protein synthesis.
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Final Answer Key:
1.
Nucleus
2.
Nuclear envelope
3.
Nucleolus
4.
Rough Endoplasmic Reticulum (RER)
5.
Smooth Endoplasmic Reticulum (SER)
6.
Mitochondrion
7.
Golgi apparatus
8.
Lysosome
9.
Cytoskeleton
10.
Centrioles
11.
Ribosomes
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✔ This is a typical animal cell diagram — note that plant cells would have additional structures like a cell wall, chloroplasts, and a large central vacuole, which are not present here.
Let me know if you'd like this turned into a printable worksheet format!
Parent Tip: Review the logic above to help your child master the concept of labeling a cell worksheet.
