uwl-280-145
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  Lumbar vertebra (superior view)

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Unit_03-23a

1. Spinous process

2. Superior articular process

3. Transverse process

4. Vertebral  foramen

5. Body

 Inferior View

 Right Lateral View

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In keeping with their greater load-bearing function, the lumbar vertebrae are the largest and strongest in the vertebral column.  In humans, there are five lumbar vertebrae (L1-L5), and their various projections are short and stout.  The spinous processes  (which project nearly straight posteriorly) provide a broad surface for the attachment of the large back muscles.

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