Regional terms refer to particular structures in specific areas of the human body. The human body has two primary regions— the axial and the appendicular region, which can both be further divided into sub-regions. The axial region is defined by a central vertical axis that runs from the head to the abdomen. It has several sub-regions, including the cephalic – the head, cervical— the neck, thoracic— the thorax, and abdominal— the abdomen. It also includes the sacrum and coccyx located posteriorly at the base of the spine The appendicular region is composed of the appendages, the upper and lower limbs, connected to the axial region. The upper limbs comprise many regions, such as the manus or hand, which further consists of the pollex or thumb and the digits or fingers. Similarly, the lower extremity begins at the coxal region or the hip, extends to the femoral region or the thigh, and ends at the pedal region or the foot.