What are the structure and main functions of the spinal cord?

The spinal cord lies in the spinal canal and is cylindrical, somewhat flattened in the anteroposterior direction, a cord, at the top it passes into the medulla oblongata (brain section). The spinal cord is composed of gray and white matter. The spinal cord performs two main functions: reflex and conduction.
Two main functions of the spinal cord are known: conductor; Reflex.
1) The conduction function is that nerve impulses along the ascending paths of the brain move to the brain, and commands are sent along the descending paths from the brain to the working organs.
2) The reflex function of the spinal cord is that it allows you to perform simple reflexes (knee-jerk reflex, jerking of the arm, flexion and extension of the upper and lower extremities, etc.).

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