The term 'ankle-knee connector' refers to the SHIN, which is the lower leg bone connecting the ankle and knee. It is the longest bone in the human body and is made up of two parts: the tibia and fibula. The tibia is the larger of the two bones and is located on the inner side of the leg, while the fibula is the smaller bone located on the outer side of the leg. The SHIN is responsible for providing stability and support to the lower leg, as well as helping to absorb shock when walking or running.