What anatomical term describes the upper part of the body in mammals?

The upper part of the body in mammals, referred to as the thorax, is an important anatomical region that houses various vital organs and structures. The thorax includes the rib cage, which provides protection for the heart and lungs, and it is involved in the respiratory system. It is located above the abdomen and below the neck, forming a crucial area that connects the head and upper limbs to the rest of the body.

The other terms describe different anatomical regions. The abdomen is located below the thorax and contains organs associated with digestion and other bodily functions. The pelvis is further down in the body and is associated with the reproductive and excretory organs. The cranium is the part of the skull that encases the brain and is located above the thorax and neck. Thus, in the context of the anatomical layout of mammals, the thorax is specifically identified as the upper part of the body.