Solved Sheep brain dissection worksheet Identify and label | Chegg.com - Free Printable

Let’s go step by step to label the sheep brain correctly.

First, look at the outer parts of the brain — these are the lobes. The front part (toward the nose) is the frontal lobe. That’s labeled A.

Behind the frontal lobe is the parietal lobe — that’s B.

At the very back of the brain is the occipital lobe — that’s C.

Now, inside the brain, there’s a space called the lateral ventricle — that’s D, shown as a cavity in the middle.

Above the lateral ventricle, near the center, is the thalamus — that’s E.

And just behind and above the thalamus is a small gland called the pineal gland — that’s F.

Now for the boxes below:

Starting from the leftmost box under the brain — it points to the area where the optic nerves cross → that’s the optic chiasm.

Next box to the right — points to the lower front part of the brainstem → that’s the hypothalamus.

The long box underneath those two? It spans across the midbrain and pons area — but since we have separate labels, let’s assign them properly.

Actually, looking again:

- The box pointing to the bulge just above the medulla → that’s the pons.
- The box pointing to the narrow part connecting to the spinal cord → that’s the medulla.
- The very end, trailing off → that’s the spinal cord.
- The box pointing to the region between hypothalamus and pons → that’s the midbrain.
- And the big white band running through the middle of the brain (visible in the cut) → that’s the corpus callosum.

Wait — let’s match the boxes carefully based on position:

From left to right along the bottom:

1. First box (leftmost): points to the crossing point of optic nerves → optic chiasm
2. Second box: points to the area just above the pituitary stalk → hypothalamus
3. Third box (long one spanning middle): this likely points to the corpus callosum (the thick band you can see in the sagittal cut)
4. Fourth box: points to the mid-section of the brainstem → midbrain
5. Fifth box: points to the rounded bulge → pons
6. Sixth box: points to the tapered part leading to spinal cord → medulla
7. Seventh box (far right): points to the tail-like extension → spinal cord

Also, the two boxes on the cerebellum (the leafy-looking structure at the back):

- Top box on cerebellum → probably not needed since instructions say “fill in the boxes” only for the listed terms, and cerebellum isn’t in the list. But wait — the instruction says “Fill in the boxes: optic chiasm; midbrain; pons; medulla; hypothalamus; corpus callosum; spinal cord.” So 7 terms for 7 boxes.

Looking again at the image layout:

There are 7 empty boxes total:

- 5 along the bottom stem
- 2 on the cerebellum

But cerebellum isn't in the "fill in" list — so maybe those two boxes on the cerebellum are distractors or mislabeled? Wait — no, actually, rechecking the original problem:

It says:
“A-F: thalamus; pineal gland; frontal lobe; occipital lobe; parietal lobe; lateral ventricle” → that’s 6 items for A-F.

Then:
“Fill in the boxes: optic chiasm; midbrain; pons; medulla; hypothalamus; corpus callosum; spinal cord.” → 7 items.

In the diagram, there are exactly 7 boxes to fill:

- One box pointing to optic chiasm (under front)
- One to hypothalamus (just behind that)
- One large box under the middle — likely corpus callosum (since it's the big white tract visible in the cut)
- One to midbrain (above pons)
- One to pons (bulge)
- One to medulla (below pons)
- One to spinal cord (end)

The two boxes on the cerebellum — they might be mistakes, or perhaps one is meant for something else? But cerebellum isn’t in the list. Let me double-check standard sheep brain diagrams.

Actually, in many worksheets, the two boxes on the cerebellum are sometimes used for “cerebellum” itself — but since it’s not in the given list, and the instruction says “fill in the boxes” with those 7 specific terms, I think those two boxes on the cerebellum may be errors or red herrings. But wait — counting the boxes in the image:

Looking closely:

- There are 5 boxes along the brainstem/spinal cord area.
- Plus 2 boxes on the cerebellum → total 7.

But the 7 terms don’t include cerebellum. Hmm.

Alternative approach: Maybe one of the boxes on the cerebellum is meant for “corpus callosum”? No, corpus callosum is internal, not on cerebellum.

Wait — perhaps I miscounted. Let me list all labeled positions:

Labels A-F are already placed on the brain.

Then there are 7 blank boxes:

Box 1: points to optic chiasm (front underside)

Box 2: points to hypothalamus (just behind box 1)

Box 3: long box under the center — this must be corpus callosum (it’s the prominent white matter tract visible in the sagittal section)

Box 4: points to midbrain (between hypothalamus and pons)

Box 5: points to pons (the bulge)

Box 6: points to medulla (below pons)

Box 7: points to spinal cord (tail)

That’s 7 boxes — perfect.

The two boxes drawn on the cerebellum — upon closer inspection, they might be attached to the same structures? Or perhaps it’s a drawing error. In standard labeling, the cerebellum doesn’t get labeled with those terms. So I’ll ignore the cerebellum boxes for now and assign the 7 terms to the 7 boxes along the bottom.

But wait — in the image, there are clearly two boxes pointing to the cerebellum. That suggests maybe the worksheet intends for us to use those for two of the terms? But none fit.

Unless... perhaps one of them is for “midbrain” or something? No.

Another idea: maybe the “corpus callosum” box is the long one under the middle, and the other boxes are straightforward.

Let me finalize based on standard anatomy:

A = frontal lobe
B = parietal lobe
C = occipital lobe
D = lateral ventricle
E = thalamus
F = pineal gland

Boxes (from left to right along the base):

1. Optic chiasm
2. Hypothalamus
3. Corpus callosum (the big white band)
4. Midbrain
5. Pons
6. Medulla
7. Spinal cord

Yes, that matches.

The two boxes on the cerebellum — perhaps they are not meant to be filled, or it’s a mistake in the diagram. Since the instruction says “fill in the boxes” with those 7 terms, and there are 7 boxes if we count only the ones along the stem, I’ll proceed with that.

Final Answer:

A. frontal lobe
B. parietal lobe
C. occipital lobe
D. lateral ventricle
E. thalamus
F. pineal gland

Boxes (left to right):
1. optic chiasm
2. hypothalamus
3. corpus callosum
4. midbrain
5. pons
6. medulla
7. spinal cord