Detailed anatomical illustration of the human skull, vertebral column, and thoracic cage with numbered labels.

Let’s go step by step to label the parts of the skeleton shown in the diagram.

We have three main sections:
1. The skull (front and side views) — labeled 1 to 15
2. The spine (vertebral column) — labeled 16 to 22
3. The rib cage and sternum — labeled A, B, C, D

---

Part 1: Skull Labels (Front View)

Looking at the front view of the skull:

- 1 → This is the top part of the skull → Frontal bone
- 2 → Eye socket → Orbit
- 3 → Cheekbone area → Zygomatic bone
- 4 → Upper jaw → Maxilla
- 5 → Lower jaw → Mandible

Now the other side (right side of face):

- 10 → Same as #2 on left → Orbit
- 11 → Nose bridge area → Nasal bone
- 12 → Side of nose / upper jaw → Maxilla (same as #4)
- 13 → Chin area → Mandible (same as #5)

Wait — actually, looking again, labels 1–5 are on the left side of the front view, and 10–13 are on the right side. So we’re labeling both sides symmetrically.

But let’s check standard anatomy:

Actually, for clarity:

In many textbooks:

- 1 = Frontal bone
- 2 = Orbit (eye socket)
- 3 = Zygomatic bone (cheekbone)
- 4 = Maxilla (upper jaw)
- 5 = Mandible (lower jaw)

On the right side:

- 10 = Orbit (same as 2)
- 11 = Nasal bone
- 12 = Maxilla (same as 4)
- 13 = Mandible (same as 5)

So those are consistent.

---

Side View of Skull (Labels 6–9 and 14–15)

Left side view:

- 6 → Top/back of skull → Parietal bone
- 7 → Back of skull → Occipital bone
- 8 → Ear area → Temporal bone
- 9 → Jaw joint area → still Mandible, but sometimes called condyle or ramus — but since it’s pointing to the lower jaw, it’s Mandible

Right side view (mirror image):

- 14 → Temple area → Temporal bone (same as 8)
- 15 → Back of head → Occipital bone (same as 7)

Wait — actually, looking at positions:

In side view:

Label 6 is parietal
Label 7 is occipital
Label 8 is temporal
Label 9 is mandible (angle or body)

Label 14 is temporal (same as 8)
Label 15 is occipital? Wait no — 15 is near ear, so probably temporal too? Let me double-check.

Actually, in most diagrams:

From left side view:

- 6 = Parietal
- 7 = Occipital
- 8 = Temporal
- 9 = Mandible

From right side view:

- 14 = Temporal (same as 8)
- 15 = Occipital? But that doesn’t match position.

Wait — perhaps 15 is sphenoid or something else? No, likely:

Standard labeling:

In lateral (side) view:

Anterior to posterior:

Frontal → Parietal → Occipital

And below: Temporal, then Mandible.

So:

Left side:

6 = Parietal
7 = Occipital
8 = Temporal
9 = Mandible

Right side:

14 = Temporal (same as 8)
15 = Occipital? But 15 is more anterior than 7.

Actually, looking at the diagram carefully — label 15 is pointing to the same region as 8 — so likely Temporal bone

And 14 might be... wait, 14 is above 15 — maybe 14 is parietal? But 6 is already parietal on left.

This is confusing. Let me think differently.

Perhaps the numbers are assigned per structure, not per side.

Better approach: Use standard anatomical terms based on location.

Let me list all skull labels with correct names:

Front view:

1. Frontal bone
2. Orbit
3. Zygomatic bone
4. Maxilla
5. Mandible
10. Orbit (right)
11. Nasal bone
12. Maxilla (right)
13. Mandible (right)

Side view (left):

6. Parietal bone
7. Occipital bone
8. Temporal bone
9. Mandible (ramus/body)

Side view (right):

14. Temporal bone (same as 8)
15. Occipital bone? Or maybe sphenoid? Actually, 15 is likely Temporal bone again — but that would duplicate.

Wait — perhaps 15 is Sphenoid bone? But it's not usually visible externally.

I recall that in some diagrams, label 15 points to the mastoid process of temporal bone, but still under temporal.

To avoid confusion, let’s use common textbook answers for such diagrams.

Typically:

Skull labels:

1. Frontal
2. Orbit
3. Zygomatic
4. Maxilla
5. Mandible
6. Parietal
7. Occipital
8. Temporal
9. Mandible (again, or angle)
10. Orbit
11. Nasal
12. Maxilla
13. Mandible
14. Temporal
15. Occipital? Or maybe "external auditory meatus" — but that’s part of temporal.

Actually, upon second thought, in many standardized diagrams:

Label 15 is often the occipital bone even in side view if it’s at the back.

But in this diagram, 15 is near the ear, so likely temporal bone.

Similarly, 14 might be parietal — but 6 is already parietal.

I think there’s a mistake in my assumption.

Let me look for symmetry.

The diagram has two side views — one from left, one from right.

Left side: labels 6,7,8,9

Right side: labels 14,15

Probably:

6 = Parietal (left)
7 = Occipital (left)
8 = Temporal (left)
9 = Mandible (left)

14 = Temporal (right)
15 = Occipital (right)? But occipital is midline.

Actually, occipital is single bone at back, so should be same for both sides.

Perhaps 15 is sphenoid or zygomatic — but zygomatic is already labeled.

Another idea: in some diagrams, label 15 is the foramen magnum area, but that’s internal.

I found a better way: let’s assume standard labeling used in schools.

Commonly:

For skull:

1. Frontal bone
2. Orbit
3. Zygomatic bone
4. Maxilla
5. Mandible
6. Parietal bone
7. Occipital bone
8. Temporal bone
9. Mandible (condyle or angle)
10. Orbit
11. Nasal bone
12. Maxilla
13. Mandible
14. Temporal bone
15. Occipital bone — but that doesn't make sense for position.

Wait — looking at the image description, label 15 is on the right side, near the ear, same as 8 on left. So likely temporal bone.

And 14 is above it — perhaps parietal bone on right side.

Yes! That makes sense.

So:

Left side view:

6 = Parietal
7 = Occipital
8 = Temporal
9 = Mandible

Right side view:

14 = Parietal (right side)
15 = Temporal (right side)

But occipital is only one bone, so why isn't it labeled on right? Probably because it's midline, and 7 covers it.

In many diagrams, they don't duplicate midline bones.

So for right side, 14 and 15 are parietal and temporal respectively.

But 6 is already parietal on left, so 14 should also be parietal.

Similarly, 8 and 15 are both temporal.

And 7 is occipital, which is central.

So:

6 = Parietal bone
7 = Occipital bone
8 = Temporal bone
9 = Mandible
14 = Parietal bone (right)
15 = Temporal bone (right)

But that means parietal and temporal are listed twice, which is fine since they are paired bones.

Occipital is unpaired, so only once.

Mandible is unpaired, but labeled multiple times for different parts.

Okay, I'll go with that.

---

Spine Labels (16 to 22)

The vertebral column:

- 16 = Cervical vertebrae (neck) — specifically, atlas or axis? Usually 16 is C1 (atlas)
- 17 = C2 (axis)
- 18 = Other cervical vertebrae (C3-C7)
- 19 = Thoracic vertebrae (T1-T12)
- 20 = Lumbar vertebrae (L1-L5)
- 21 = Sacrum
- 22 = Coccyx

Standard division:

Cervical: 7 vertebrae — labels 16,17,18 might cover them

Thoracic: 12 — label 19

Lumbar: 5 — label 20

Sacrum: fused — label 21

Coccyx: tailbone — label 22

So:

16 = Atlas (C1)
17 = Axis (C2)
18 = Remaining cervical vertebrae (C3-C7)
19 = Thoracic vertebrae
20 = Lumbar vertebrae
21 = Sacrum
22 = Coccyx

Sometimes 16 is just "cervical", but since there are three labels, likely细分.

In many diagrams:

16 = Cervical region
17 = Thoracic region
etc., but here the brackets suggest regions.

Looking at the diagram:

There are brackets:

- Bracket around 16,17,18 → cervical
- Bracket around 19 → thoracic
- Bracket around 20 → lumbar
- Bracket around 21 → sacral
- Bracket around 22 → coccygeal

But the labels are on individual parts.

Typically:

16 = First cervical vertebra (atlas)
17 = Second cervical vertebra (axis)
18 = Other cervical vertebrae
19 = Thoracic vertebrae
20 = Lumbar vertebrae
21 = Sacrum
22 = Coccyx

Yes.

---

Rib Cage Labels (A, B, C, D)

The rib cage diagram:

- A = True ribs (attach directly to sternum) — usually ribs 1-7
- B = False ribs (attach indirectly or not at all) — ribs 8-12
- C = Floating ribs (no attachment to sternum) — ribs 11-12
- D = Sternum (breastbone) — includes manubrium, body, xiphoid process

In the diagram:

Bracket A covers ribs attached to sternum via costal cartilage — true ribs.

Bracket B covers ribs that attach to cartilage of rib above — false ribs.

Bracket C covers the last two ribs that don't attach at all — floating ribs.

D is the sternum itself.

Also, within sternum:

Manubrium (top), Body (middle), Xiphoid process (bottom)

But D is the whole sternum.

So:

A = True ribs
B = False ribs
C = Floating ribs
D = Sternum

Sometimes C is included in B, but here they are separate.

In the diagram, C is specifically the floating ribs.

Yes.

---

Now, compiling all answers:

Skull:

1. Frontal bone
2. Orbit
3. Zygomatic bone
4. Maxilla
5. Mandible
6. Parietal bone
7. Occipital bone
8. Temporal bone
9. Mandible
10. Orbit
11. Nasal bone
12. Maxilla
13. Mandible
14. Parietal bone
15. Temporal bone

Spine:

16. Atlas (C1)
17. Axis (C2)
18. Cervical vertebrae (C3-C7)
19. Thoracic vertebrae
20. Lumbar vertebrae
21. Sacrum
22. Coccyx

Rib Cage:

A. True ribs
B. False ribs
C. Floating ribs
D. Sternum

I think that's accurate for a school-level diagram.

Final Answer:

1. Frontal bone
2. Orbit
3. Zygomatic bone
4. Maxilla
5. Mandible
6. Parietal bone
7. Occipital bone
8. Temporal bone
9. Mandible
10. Orbit
11. Nasal bone
12. Maxilla
13. Mandible
14. Parietal bone
15. Temporal bone
16. Atlas
17. Axis
18. Cervical vertebrae
19. Thoracic vertebrae
20. Lumbar vertebrae
21. Sacrum
22. Coccyx
A. True ribs
B. False ribs
C. Floating ribs
D. Sternum