CELLS alive! - Animal Cell Worksheet - Free Printable

The image provided is a diagram of an animal cell, and the task appears to be labeling the various parts of the cell. Below is the solution with explanations for each labeled part:

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Labeled Parts of the Animal Cell:

1. Lysosome ("Suicidal Bags")
- Explanation: Lysosomes are membrane-bound organelles that contain digestive enzymes. They break down waste materials and cellular debris, hence the nickname "suicidal bags."

2. Cell Membrane
- Explanation: The cell membrane is the outer boundary of the cell. It regulates what enters and exits the cell, maintaining the internal environment.

3. Cytoplasm
- Explanation: The cytoplasm is the gel-like substance inside the cell membrane where most cellular activities occur. It contains organelles and other structures.

4. Smooth Endoplasmic Reticulum (SER)
- Explanation: The smooth ER lacks ribosomes on its surface. It is involved in lipid synthesis, detoxification, and storage of calcium ions.

5. Rough Endoplasmic Reticulum (RER)
- Explanation: The rough ER has ribosomes attached to its surface. It is involved in protein synthesis and modification.

6. Mitochondria
- Explanation: Mitochondria are often called the "powerhouses" of the cell because they produce energy in the form of ATP through cellular respiration.

7. Golgi Apparatus
- Explanation: The Golgi apparatus modifies, sorts, and packages proteins and lipids for secretion or use within the cell.

8. Vacuole
- Explanation: Vacuoles store substances such as water, nutrients, and waste products. In plant cells, vacuoles are larger, but in animal cells, they are smaller.

9. Nucleus
- Explanation: The nucleus is the control center of the cell. It contains the cell's DNA and is responsible for regulating gene expression and protein synthesis.

10. Ribosomes
- Explanation: Ribosomes are small structures where protein synthesis occurs. They can be free-floating in the cytoplasm or attached to the rough ER.

11. Centrioles
- Explanation: Centrioles are involved in cell division (mitosis). They help organize the microtubules that form the mitotic spindle.

12. Microtubules
- Explanation: Microtubules are part of the cytoskeleton, providing structural support and aiding in the movement of organelles within the cell.

13. Peroxisomes
- Explanation: Peroxisomes are involved in breaking down fatty acids and detoxifying harmful substances like hydrogen peroxide.

14. Intermediate Filaments
- Explanation: Intermediate filaments are part of the cytoskeleton, providing structural support and anchoring organelles in place.

15. Cilia/Flagella
- Explanation: Cilia and flagella are hair-like structures that aid in cell movement or the movement of substances across the cell surface.

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Final Answer:

Here is the completed labeling of the diagram:

1. Lysosome
2. Cell Membrane
3. Cytoplasm
4. Smooth Endoplasmic Reticulum
5. Rough Endoplasmic Reticulum
6. Mitochondria
7. Golgi Apparatus
8. Vacuole
9. Nucleus
10. Ribosomes
11. Centrioles
12. Microtubules
13. Peroxisomes
14. Intermediate Filaments
15. Cilia/Flagella

Boxed Final Answer:
\[
\boxed{
\begin{array}{ll}
1. & \text{Lysosome} \\
2. & \text{Cell Membrane} \\
3. & \text{Cytoplasm} \\
4. & \text{Smooth Endoplasmic Reticulum} \\
5. & \text{Rough Endoplasmic Reticulum} \\
6. & \text{Mitochondria} \\
7. & \text{Golgi Apparatus} \\
8. & \text{Vacuole} \\
9. & \text{Nucleus} \\
10. & \text{Ribosomes} \\
11. & \text{Centrioles} \\
12. & \text{Microtubules} \\
13. & \text{Peroxisomes} \\
14. & \text{Intermediate Filaments} \\
15. & \text{Cilia/Flagella} \\
\end{array}
}
\]