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Your back is the rear surface of your body that extends from your neck down to your hips, made up of bones, muscles, and nerves. It matters because it supports your posture, protects your spinal cord, and enables you to move, twist, and bend in daily activities.
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The human back, also called the dorsum (pl.: dorsa), is the large posterior area of the human body, rising from the top of the buttocks to the back of the neck. It is the surface of the body opposite from the chest and the abdomen. The vertebral column runs the length of the back and creates a central area of recession. The breadth of the back is created by the shoulders at the top and the pelvis at the bottom.
Back pain is a common medical condition, generally benign in origin.