Question

multiple choice question

which of the following consists of 5 fused vertebrae?

lumbar vertebrae
coccyx
sacrum
cervical vertebrae

Explanation:

Analyze the question and options

The question asks which anatomical structure consists of 5 fused vertebrae. Let's evaluate each option based on the anatomy of the human vertebral column.

Evaluate each anatomical structure

Using the Vertebral Column Divisions and Sacrum and Coccyx Anatomy knowledge points:

• Lumbar vertebrae: Typically consist of 5 individual, non-fused (moveable) vertebrae located in the lower back.
• Coccyx: Typically consists of 3 to 5 (most commonly 4) small, fused vertebrae forming the tailbone.
• Sacrum: A large, triangular bone at the base of the spine that is formed by the fusion of 5 sacral vertebrae (\(S_1\) through \(S_5\)).
• Cervical vertebrae: Consist of 7 individual, non-fused vertebrae located in the neck region.

Identify the correct match

Using the Sacrum and Coccyx Anatomy knowledge point:

• The sacrum is the structure composed of exactly 5 fused vertebrae.
• Therefore, the correct option is "Sacrum".

Answer:

• Lumbar vertebrae
• coccyx
• Sacrum (Correct answer)
• Cervical vertebrae