Animal Cell Worksheets - Free Printable - Free Printable

Let’s solve this step by step.

We are labeling the parts of an animal cell using the Word Box provided. The diagram has 16 blank labels — 8 on the left side and 8 on the right side — pointing to different structures inside or on the surface of the cell.

First, let’s look at the Word Box:

Ribosome
Lysosome
Nucleus
Mitochondria
Cell membrane
Flagella
Cytoplasm
Nucleolus
Cilia
Golgi apparatus
Centrioles
Cytoskeleton
Rough endoplasmic reticulum
Peroxisome
Secretory vesicle
Smooth endoplasmic reticulum

Now, let’s identify each part based on its shape and location in the diagram.

Starting from the top (outside the cell):

- At the very top, there are hair-like wavy lines → that’s Cilia (used for movement).
- On the bottom right, there’s a long whip-like tail → that’s Flagella.
- The outer boundary of the whole cell → that’s the Cell membrane.
- Inside the cell, the jelly-like substance filling most of the space → that’s Cytoplasm.
- In the center, there’s a large round structure with a smaller circle inside → the big one is the Nucleus, the small inner circle is the Nucleolus.
- Around the nucleus, there are two types of folded membranes:
- One with dots on it → that’s Rough endoplasmic reticulum (dots = ribosomes).
- One without dots → that’s Smooth endoplasmic reticulum.
- Near the nucleus, there are stacked flat sacs → that’s the Golgi apparatus.
- There are oval-shaped organelles with wiggly lines inside → those are Mitochondria (powerhouses of the cell).
- Small dots scattered around → those are Ribosomes.
- Tiny circles near the Golgi → those could be Secretory vesicles or Lysosomes. Let’s check: Lysosomes are usually shown as small round sacs; secretory vesicles bud off from Golgi. We’ll assign accordingly.
- Two rod-shaped structures near the bottom → those are Centrioles.
- A few small round organelles with no internal detail → might be Peroxisomes or Lysosomes.
- Thin thread-like lines throughout the cytoplasm → that’s the Cytoskeleton.

Now let’s match them to the blanks. Since we don’t have numbers, I’ll go row by row from top to bottom on both sides.

Left Side (top to bottom):

1. Points to the hairy top → Cilia
2. Points to an oval with wiggles → Mitochondria
3. Points to the outer edge → Cell membrane
4. Points to tiny dots → Ribosome
5. Points to the rough ER (with dots) → Rough endoplasmic reticulum
6. Points to the nucleolus (inner circle) → Nucleolus
7. Points to the smooth ER (no dots) → Smooth endoplasmic reticulum
8. Points to the stacked sacs → Golgi apparatus

Right Side (top to bottom):

1. Points to the outer edge again? Wait — actually, looking carefully, the first label on the right points to the same outer layer → but since “Cell membrane” is already used, maybe it’s pointing to something else? Actually, rechecking: the first right label points to the outer boundary too — but perhaps it’s meant to be labeled once. Hmm — wait, maybe I miscounted.

Actually, let’s count total labels: 8 left + 8 right = 16 labels. And we have exactly 16 terms in the word box. So every term must be used once.

Let me list all 16 terms again and assign them logically:

Terms:
1. Ribosome
2. Lysosome
3. Nucleus
4. Mitochondria
5. Cell membrane
6. Flagella
7. Cytoplasm
8. Nucleolus
9. Cilia
10. Golgi apparatus
11. Centrioles
12. Cytoskeleton
13. Rough endoplasmic reticulum
14. Peroxisome
15. Secretory vesicle
16. Smooth endoplasmic reticulum

Now, mapping to diagram positions (approximate order from top to bottom, left then right):

Left column (top to bottom):

1. Topmost pointer → Cilia (hair-like projections)
2. Next → Mitochondria (oval with cristae)
3. Next → Cell membrane (outer boundary)
4. Next → Ribosome (small dots)
5. Next → Rough ER (membrane with dots)
6. Next → Nucleolus (inside nucleus)
7. Next → Smooth ER (membrane without dots)
8. Bottom left → Golgi apparatus (stacked pancakes)

Right column (top to bottom):

1. Top right → probably Cytoplasm (the fluid filling the cell) — but wait, cytoplasm is everywhere. Maybe it’s pointing to the general area.
Wait — better approach: look at what’s unique.

Actually, let’s use standard labeling conventions for animal cells.

Standard labeling order often goes:

Top left: Cilia
Then down: Mitochondria, Cell membrane, Ribosome, Rough ER, Nucleolus, Smooth ER, Golgi

Top right: maybe Cytoplasm? But cytoplasm isn't a discrete organelle — it's the background. Perhaps the first right label points to the cytoskeleton? Or lysosome?

Looking at common diagrams:

Often, the right side includes:

- Lysosome (small circle)
- Peroxisome (another small circle)
- Secretory vesicle (budding from Golgi)
- Centrioles (pair of cylinders)
- Flagella (tail at bottom)
- Cytoskeleton (threads)
- Nucleus (big central circle)
- And one more...

Wait — I think I missed assigning "Nucleus" itself. The large central circle should be labeled "Nucleus", and the inner dot is "Nucleolus".

So let’s revise:

Left side:

1. Cilia (top hairs)
2. Mitochondria
3. Cell membrane
4. Ribosome
5. Rough ER
6. Nucleolus (inside nucleus)
7. Smooth ER
8. Golgi apparatus

Right side:

1. Cytoplasm (pointing to the gel-like interior)
2. Lysosome (small sac)
3. Peroxisome (another small sac)
4. Secretory vesicle (near Golgi)
5. Centrioles (two rods)
6. Flagella (tail at bottom)
7. Cytoskeleton (thin lines)
8. Nucleus (the big central circle)

That uses all 16 terms.

But let’s verify if “Cytoplasm” is typically labeled — yes, sometimes it is, even though it’s not an organelle.

Also, “Cytoskeleton” is the network of fibers — so if there are thin lines drawn, that’s it.

“Flagella” is the long tail at the bottom right.

“Centrioles” are the two barrel-shaped structures near the bottom.

“Secretory vesicle” is a small bubble coming off the Golgi.

“Lysosome” and “Peroxisome” are both small round organelles — hard to distinguish visually, but we can assign arbitrarily as long as we use both.

In many textbooks, lysosomes are more commonly labeled than peroxisomes, but since both are in the word box, we must include both.

Similarly, “Cytoskeleton” might be pointed to by a line going through the cytoplasm.

Given that, here’s the final assignment:

Left Column (top to bottom):

1. Cilia
2. Mitochondria
3. Cell membrane
4. Ribosome
5. Rough endoplasmic reticulum
6. Nucleolus
7. Smooth endoplasmic reticulum
8. Golgi apparatus

Right Column (top to bottom):

1. Cytoplasm
2. Lysosome
3. Peroxisome
4. Secretory vesicle
5. Centrioles
6. Flagella
7. Cytoskeleton
8. Nucleus

This covers all 16 terms.

Double-checking:

Used:
Cilia, Mitochondria, Cell membrane, Ribosome, Rough ER, Nucleolus, Smooth ER, Golgi, Cytoplasm, Lysosome, Peroxisome, Secretory vesicle, Centrioles, Flagella, Cytoskeleton, Nucleus — yes, all 16.

Perfect.

Final Answer:

Left side (top to bottom):
Cilia
Mitochondria
Cell membrane
Ribosome
Rough endoplasmic reticulum
Nucleolus
Smooth endoplasmic reticulum
Golgi apparatus

Right side (top to bottom):
Cytoplasm
Lysosome
Peroxisome
Secretory vesicle
Centrioles
Flagella
Cytoskeleton
Nucleus