Final answer:
In the bridge pose, the vertebral column is lifted, showcasing the role of bones as levers in the musculoskeletal system during muscle contraction.
Step-by-step explanation:
In Yoga, the bridge pose primarily involves lifting the vertebral column, which surrounds and protects the spinal cord. This pose supports the head and provides an attachment point for muscles of the back and neck. In performing a bridge pose, your muscles contract and act as levers, with your bones transmitting the forces produced. This illustrates the interplay of the skeletal and muscular systems, known as the musculoskeletal system.