There are 33 vertebrae in a human.
These 33 vertebrae are divided into five distinct regions, each with a specific number of bones and function. These regions combine to make the spinal column, which, along with the skull, ribs, and sternum make up the axial skeletal system:
- Cervical: Located in the neck region, there are 7 cervical vertebrae.
- Thoracic: Located in the upper back, there are 12 thoracic vertebrae.
- Lumbar: Located in the lower back, there are 5 lumbar vertebrae.
- Sacral: These 5 sacral vertebrae are fused together to form the sacrum, located at the base of the spine and part of the pelvis.
- Coccygeal: These 4 coccygeal vertebrae are also fused, forming the coccyx, or tailbone.
| Vertebral Region | Number of Vertebrae |
|---|---|
| Cervical | 7 |
| Thoracic | 12 |
| Lumbar | 5 |
| Sacral | 5 (fused) |
| Coccygeal | 4 (fused) |
| Total | 33 |
Understanding the number and arrangement of the vertebrae is crucial in studying human anatomy and diagnosing spinal conditions. Each section plays a vital role in movement, support, and protecting the spinal cord.
