AP BIOLOGY

Detailed explanation-1: -The spinal cord is a long bundle of nerve tissue. In an adult, it’s about 18 inches long and 1/2-inch thick. It extends from the lower part of the brainstem down the back. The spinal cord has three sections that run the length of the spine.

Detailed explanation-2: -The spinal cord is a thick bundle of nerve tissue that carries information about the body to the brain and from the brain to the body.

Detailed explanation-3: -Cauda equina: The spinal cord ends about three fourths of the way down the spine, but a bundle of nerves extends beyond the cord. This bundle is called the cauda equina because it resembles a horse’s tail. The cauda equina carries nerve impulses, both motor and sensory, to and from the legs.

Detailed explanation-4: -(SPY-nul kord) A column of nerve tissue that runs from the base of the skull down the center of the back. It is covered by three thin layers of protective tissue called membranes. The spinal cord and membranes are surrounded by the vertebrae (back bones).