The thoracic skeleton is a bony structure that forms the chest area in humans and other mammals. It consists of the thoracic vertebrae, ribs, and the sternum. This framework protects vital organs such as the heart and lungs while providing support for the upper body. The thoracic skeleton plays a crucial role in respiration. The movement of the ribs during breathing expands and contracts the chest cavity, allowing air to flow in and out of the lungs. Additionally, the thoracic skeleton serves as an attachment point for muscles involved in breathing and upper limb movement.