Which of this pa of veebral canal will show secondary curves with concavity backward?: (A) Cervical, (B) Thoracic, (C) Sacral, (D) Coccyx
Answer is A. In veebrates, cervical veebrae (singular: veebra) are the veebrae of the neck, immediately below the skull. Thoracic veebrae in all mammalian species are those veebrae that also carry a pair of ribs, and lie caudal to the cervical veebrae.