HUMAN NUTRITION

Detailed explanation-1: -Vertebrae: The spine has 33 stacked vertebrae (small bones) that form the spinal canal.

Detailed explanation-2: -Vertebrae are the 33 individual bones that interlock with each other to form the spinal column. The vertebrae are numbered and divided into regions: cervical, thoracic, lumbar, sacrum, and coccyx (Fig. 2). Only the top 24 bones are moveable; the vertebrae of the sacrum and coccyx are fused.

Detailed explanation-3: -The vertebral column (spine) defines the animal subphylum Vertebra, or vertebrates, of the phylum Chordata. In humans, it is composed of 33 vertebrae that include 7 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 4 coccygeal.

Detailed explanation-4: -The vertebral column in human skeleton usually consists of 33 vertebrae. They are 24 presacral vertebrae (7 cervical, 12 thoracic and 5 lumbar) followed by the sacrum (5 fused sacral vertebrae) and the coccyx (4 frequently fused coccygeal vertebrae). So, the correct answer is 33.