How many vertebrae make up the normal lumbar spine?

The normal lumbar spine is composed of five vertebrae, which are designated as L1 through L5. These vertebrae are located in the lower back region and are a crucial part of the spinal column, providing support for the upper body, allowing for movement, and protecting the spinal cord. Each lumbar vertebra has a larger body compared to those in the thoracic and cervical regions because they bear more weight and handle the stress of lifting and carrying.

This structural design is vital for the lumbar spine's function, especially in activities involving bending and lifting. Therefore, the total count of five vertebrae is a fundamental aspect of human anatomy in the lumbar region. Understanding this structure is essential for various medical fields, including radiography, as it directly relates to imaging and assessing conditions of the lower back.