NEET BIOLOGY

Detailed explanation-1: -Cervical spine: 7 vertebrae (C1–C7) Thoracic spine: 12 vertebrae (T1–T12) Lumbar spine: 5 vertebrae (L1–L5) Sacrum: 5 (fused) vertebrae (S1–S5)

Detailed explanation-2: -The modal human vertebral formula is 7:12:5:5:4, represented at 38% frequency in our sample, with the next most common pattern, 7:12:5:5:5, represented at 24% frequency (Table S2).

Detailed explanation-3: -A formula indicating the number of vertebrae in each segment of the spinal column for humans is C7, T12, L5, S5, Co4 = 33, the letters denoting cervical, thoracic, lumbar, sacral, and coccygeal.

Detailed explanation-4: -Vertebrae: The spine has 33 stacked vertebrae (small bones) that form the spinal canal. The spinal canal is a tunnel that houses the spinal cord and nerves, protecting them from injury. Most vertebrae move to allow for a range of motion. The lowest vertebrae (sacrum and coccyx) are fused together and don’t move.

Detailed explanation-5: -It starts at the base of your neck and ends at the bottom of your ribs. It’s the longest section of your spine. Your thoracic spine consists of 12 vertebrae, labeled T1 through T12. Vertebrae are the 33 individual, interlocking bones that form your spinal column.