Question

The bones of backbone are known as
A. Spinal cord
B. Vertebrae
C. Girdles
D. None of these

Answer 1

Hint: Every single person has a skeleton made up of many bones. These bones give your body structure, protect your internal organs, etc. It is part of the axial skeleton. It is also known as the backbone or spine.

Step by step answer:The bones of the backbone are known as vertebrae. The back is composed of twenty –four individual bones called vertebrae that are stacked one on top of the other to make up your backbone or spinal column. The twenty-four separate vertebrae are interspaced with cartilage and then additionally, the sacrum and coccyx are present. The first seven vertebrae at the top are called the cervical vertebrae. These bones are in the back of your neck, just below your brain, and they support your head and neck. Below the cervical vertebrae are the Thoracic vertebrae and there are 12 in all. They anchor ribs in place. Below the thoracic vertebrae are five lumbar vertebrae. Beneath the lumbar vertebrae is the sacrum, which is made up of five vertebrae that are fused together to form one single bone. All the bottom of the spine is the coccyx, which is one bone made of four fused vertebrae. They are weight-bearing and gives us a good center of gravity.
The spinal cord is an extension of the central nervous system (CNS) which consists of the brain and spinal cord. It is made up of bundles of nerve fibres. It runs down from the brain through a canal in the center of the bones of the spine. The shoulder girdle or pectoral girdle is the set of bones in the appendicular skeleton which connects to the arm on each side.
Hence option A is correct.

Note: The spine is made up of bones called vertebrae. Each vertebra is separated by a disc. The vertebral column houses the spinal canal, a cavity that encloses and protects the spinal cord. An intervertebral disc lies between adjacent vertebrae in the vertebral column.