The spinous processes are bony projections located on the posterior part of each vertebra in the human spine. They serve as attachment points for muscles and ligaments, playing a crucial role in the stability and movement of the spine. Each spinous process varies in size and shape depending on its location in the cervical, thoracic, or lumbar regions of the spine. These structures can be felt along the back, forming a line down the midline of the body. The spinous processes help protect the spinal cord and contribute to the overall structure of the vertebral column. They also assist in the alignment and function of the spine during various activities.