What are the bones that form the trunk of the body collectively called?

The bones that form the trunk of the body are collectively known as the axial skeleton. This includes the vertebral column (spine), rib cage, and sternum, which provide structural support and protection for vital organs, such as the heart and lungs. The axial skeleton is essential for maintaining posture and supporting the head, making it crucial for overall body stability and functionality.

In contrast, the appendicular skeleton consists of the bones of the limbs and girdles, which are involved in movement and interaction with the environment. The term 'limbo-pelvic skeleton' isn’t a standard classification in anatomy, and 'skull base' specifically refers only to the part of the skull that forms the base of the cranial cavity, which does not encompass the trunk. Thus, the designation of the axial skeleton captures all the bones central to the body’s structure, distinguishing it clearly from other skeletal classifications.