(A) Thoracic
(B) Cervical
(C) Sacral
(D) Lumbar
Choose the correct answer from the options given below:
Vertebrae Types: Correct Sequence in Human Spine
The human vertebral column, or spine, is a complex structure providing support and protecting the spinal cord. It is divided into distinct regions, each containing a specific number and type of vertebrae. Understanding the correct sequence from the top (neck) to the bottom (pelvic region) is crucial in human anatomy.
Regions of the Vertebral Column
The vertebral column consists of several types of vertebrae, arranged in a specific order:
- Cervical Vertebrae (B): These are the vertebrae located in the neck region. There are typically 7 cervical vertebrae.
- Thoracic Vertebrae (A): Situated in the chest area, these vertebrae connect to the ribs. There are 12 thoracic vertebrae.
- Lumbar Vertebrae (D): Located in the lower back, these are the largest vertebrae, supporting most of the body's weight. There are 5 lumbar vertebrae.
- Sacral Vertebrae (C): Found in the pelvic region, these vertebrae are fused together to form the sacrum. There are typically 5 vertebrae that fuse into a single sacrum bone.
- (Coccygeal Vertebrae: Below the sacrum are the coccygeal vertebrae, commonly known as the tailbone, which are also fused.)
Sequence of Vertebrae from Top to Bottom
The correct sequence of the major types of vertebrae in the human vertebral column, starting from the top, is:
| Vertebrae Type | Abbreviation | Location | Number of Vertebrae |
|---|---|---|---|
| Cervical | (B) | Neck | 7 |
| Thoracic | (A) | Chest (Thorax) | 12 |
| Lumbar | (D) | Lower Back | 5 |
| Sacral | (C) | Pelvic Region (Fused into Sacrum) | 5 (fused) |
Therefore, the correct sequence from top to bottom, considering the options provided (Cervical, Thoracic, Lumbar, Sacral), is represented by (B), (A), (D), (C).
Identifying the Correct Option
Based on the anatomical sequence of the vertebral column:
- The sequence starts with Cervical (B).
- Followed by Thoracic (A).
- Then Lumbar (D).
- And finally Sacral (C) before the coccyx.
This order matches option 3: (B), (A), (D), (C).
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