What is the term that refers to the calf of the leg?

The term that refers to the calf of the leg is "sural." The sural region is specifically located on the posterior side of the lower leg and is commonly associated with the muscles and nerves in that area, which are responsible for movements such as walking and running. This anatomical term is widely used in medical contexts to refer to injuries or conditions related to the calf, making it distinct from other regions of the leg.

In contrast, the term "plantar" pertains to the sole of the foot and does not describe any part of the leg. "Tarsal" refers to the bones in the ankle area, while "popliteal" pertains to the area behind the knee. Each of these terms has its specific anatomical context, which helps to clarify why "sural" is the correct choice when identifying the calf of the leg.