The human spine is composed of 33 vertebrae that interlock with each other to form the spinal column. The human spinal cord consists of nerves that connect the brain to nerves in the body.
The vertebrae of the spine align so that their vertebral canals form a hollow, bony tube to protect the spinal cord from external damage and infection. Between the vertebrae are small spaces known as intervertebral canals that allow spinal nerves to exit the spinal cord and connect to the various regions of the body.
A cylinder of bone known as the vertebral body makes up the majority of the lumbar vertebrae’s mass and bears most of the body’s weight. Posteriorly the body is connected to a thin ring of bone known as the arch.This diagram with labels depicts and explains the details of Picture Of Human Vertebrae.