The protective shield covers what segment of the thorax?

The protective shield typically refers to the rib cage, which covers the thoracic segment of the body. It encompasses the area from the collarbone down to the diaphragm, providing protection to vital organs such as the heart and lungs. The rib cage is composed of ribs, the sternum, and the thoracic vertebrae, forming a rigid structure that supports and safeguards the thoracic cavity.