No, there isn't.
The lumbar vertebrae are the largest because they need to be able to support more weight.
Yes, that's right.
The spinal cord is protected by the vertebral column or spinal column. The vertebral column is a collection of individual bones called vertebrae that encase and protect the spinal cord. The vertebral column is divided into three parts: seven cervical (neck) vertebrae at the top, twelve thoracic vertebrae in the midback, and five lumbar vertebrae in the lower back. Below the lumbar vertebrae, but not protecting the spinal cord, are the sacrum and coccyx (tailbone).
The lumbar vertebrae are located in the lower back region of the human spine, between the thoracic vertebrae and the sacrum. There are five lumbar vertebrae (L1 to L5) that support the weight of the upper body and allow for bending and twisting movements of the trunk.
The vertebrae
The spinal column is made of 31-33 bones, some of which are fused. There are 7 cervical vertebrae, 12 thoracic vertebrae, 5 lumbar vertebrae, 5 sacral and 2-4 coccogeal vertebrae.
It's all part of your spinal cord. The lower sections are the lumbar vertebrae and then finally the sacral vertebrae.
The spinal cord ends between the 1st and 2nd vertebrae.
A needle is inserted, usually between L4 and L5 (the fourth and fifth lumbar vertebrae), into the epidural space (below the level of the spinal cord), withdrawing spinal fluid for diagnostic purposes.
The cervical bones (1-5) run from the base of the skull to the bottom of the neck, roughly. The thoracic vertebrae (1-12) run from the end of the cervical spine to the lumbar spine. The lumbar vertebrae (1-5) run from the end of the thoracic spine to the tailbone.
A "spinal tap" is also known as a "lumbar puncture".Lumbar puncture
The lumbar vertebrae are very important in supporting the upper body in an upright position. They have an increased body sized compared to the other vertebrae for this reason. They also contain a small portion of the spinal cord and other nervous tissue and provide protection of these.