AP BIOLOGY

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: -Vertebrae. The individual bones of the spine are the vertebrae. These are the building blocks of the spinal column. The vertebrae protect and support the spinal cord.

Detailed explanation-3: -The sacrum – the base of the spine that is composed of five vertebrae fused (joined together) as one solid unit. The sacrum attaches to ilium of the pelvis, forming the sacroiliac joints. The coccyx – the “tailbone” located below the sacrum, composed of four fused vertebrae.

Detailed explanation-4: -The cervical section of the spine is made up of the top seven vertebrae in the spine, C1 to C7, and is connected to the base of the skull. The top two vertebrae are also know as the atlas and axis, which form the joint for connecting the skull to the spine.

Detailed explanation-5: -As mentioned above, our vertebrae are numbered and divided into five regions: cervical, thoracic, lumbar, sacrum, and coccyx. Did you know? Only the top 24 bones are moveable. The vertebrae of the sacrum and coccyx are fused.