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.
Vertebra â One of the 33 bones of the spinal column. A cervical, thoracic, or lumbar vertebra has a cylindricallyâshaped body anteriorly and a neural arch posteriorly (composed primarily of the laminae and pedicles as well as the other structures in the posterior aspect of the vertebra) that protects the spinal cord.