ANATOMY

Detailed explanation-1: -The vertebrae (back bones) of the spine include the cervical spine (C1-C7), thoracic spine (T1-T12), lumbar spine (L1-L5), sacral spine (S1-S5), and the tailbone. Each vertebra is separated by a disc. The vertebrae surround and protect the spinal cord.

Detailed explanation-2: -Bones, discs, ligaments and muscles all work to protect the spinal cord. The spine is made of 33 bones called vertebrae, which have holes (spinal canals) through which the spinal cord passes. Between each vertebra, discs act as cushions; absorbing shock to the spine.

Detailed explanation-3: -Irregular Bones They are primarily spongy bone that is covered with a thin layer of compact bone. The vertebrae and some of the bones in the skull are irregular bones.

Detailed explanation-4: -In humans, the vertebral column usually consists of 33 vertebrae, placed in series and connected by ligaments and intervertebral discs. However, the number of vertebrae can vary between 32 and 35. Usually there are 7 cervical, 12 thoracic, 5 lumbar, 5 sacral and 4 caudal (coccygeal) vertebrae.