An anatomy worksheet featuring a fill-in table for spinal regions and a labeled diagram of a typical vertebra for student identification.

Here is the completed worksheet with explanations for each section.

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Part 1: Spinal Region Table

| Region | Number of vertebrae | Curvature (lordosis or kyphosis) | Are the vertebrae fused or non-fused? |
|------------|---------------------|----------------------------------|----------------------------------------|
| Cervical | 7 | Lordosis | Non-fused |
| Thoracic | 12 | Kyphosis | Non-fused |
| Lumbar | 5 | Lordosis | Non-fused |
| Sacral | 5 (fused into 1 bone) | Kyphosis | Fused |
| Coccygeal | 3–5 (fused into 1 bone) | Kyphosis | Fused |

#### ✔ Explanations:
- Cervical (7 vertebrae): The neck region. It has a lordotic curve (inward curve) to support the head. These are non-fused and highly mobile.
- Thoracic (12 vertebrae): The upper/mid-back, articulating with ribs. Has a kyphotic curve (outward curve). Non-fused, allowing rib movement during breathing.
- Lumbar (5 vertebrae): Lower back. Has a lordotic curve to support body weight. Non-fused, but larger and stronger than cervical/thoracic.
- Sacral (5 fused vertebrae): Forms the sacrum, part of the pelvis. Fused in adults to provide stability and transmit body weight to legs. Curvature is kyphotic (though sometimes described as straight or slightly concave anteriorly — anatomically it’s considered part of the overall kyphotic curve).
- Coccygeal (3–5 fused vertebrae): Tailbone. Fused into one small bone. Also kyphotic (curved outward), completing the spinal curvature.

> 💡 Note: “Lordosis” = inward curve (concave posteriorly); “Kyphosis” = outward curve (convex posteriorly).

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Part 2: Identify Parts of a Typical Vertebra

Based on standard vertebral anatomy:

| Label | Structure | Explanation |
|-------|-------------------|-----------------------------------------------------------------------------|
| J | Vertebral Body | The large, anterior, weight-bearing portion of the vertebra. |
| K | Vertebral Arch | Bony arch formed by pedicles and laminae; encloses the vertebral foramen. |
| L | Transverse Process| Projects laterally from the vertebral arch; attachment site for muscles. |
| M | Articular Process | Includes superior and inferior articular processes; form joints with adjacent vertebrae. |
| N | Lamina | Posterior part of vertebral arch; connects pedicle to spinous process. |
| O | Vertebral Foramen | Opening formed by body and arch; houses the spinal cord. |
| P | Spinous Process | Posterior projection from the vertebral arch; serves as muscle attachment. |
| Q | Intervertebral Foramen | Notch between pedicles of adjacent vertebrae; allows passage of spinal nerves. *(Note: In this diagram, Q points to the space between two vertebrae — likely the intervertebral foramen, though technically it’s between two vertebrae, not part of one.)*

> ⚠️ Clarification for Q: In many diagrams, “Q” pointing to the gap between two vertebrae indicates the intervertebral foramen — the opening where spinal nerves exit the spinal column. If the question strictly asks for parts *of a single typical vertebra*, then Q might be mislabeled or referring to the vertebral notch (superior/inferior). But based on common labeling and context, Q = Intervertebral Foramen is most appropriate here.

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✔ Final Answer Summary:

#### Table:
- Cervical: 7, Lordosis, Non-fused
- Thoracic: 12, Kyphosis, Non-fused
- Lumbar: 5, Lordosis, Non-fused
- Sacral: 5 (fused), Kyphosis, Fused
- Coccygeal: 3–5 (fused), Kyphosis, Fused

#### Vertebra Labels:
- J → Vertebral Body
- K → Vertebral Arch
- L → Transverse Process
- M → Articular Process
- N → Lamina
- O → Vertebral Foramen
- P → Spinous Process
- Q → Intervertebral Foramen

Let me know if you’d like labeled diagrams or mnemonics to remember these!