Based on current consumption, it is estimated that you-and every other person in the United States-will use more than a million pounds of rocks, minerals and metals during your lifetime including: 1  800 pounds of lead-Primarily used in the construction of batteries.
The erector spinae group of muscles on each side of the vertebral column is a large muscle mass that extends from the sacrum to the skull. These muscles are primarily responsible for extending the vertebral column to maintain erect posture.he muscles of the trunk include those that move the vertebral column, the muscles that form the thoracic and abdominal walls, and those that cover the pelvic outlet.
Vertebral column - Structure. 1  In humans vertebral column there are normally thirty-three vertebrae; [3] the upper twenty-four are articulating and separated from each other by intervertebral discs, and the lower nine are fused in adults, five in the sacrum and four in the coccyx or tailbone.