part of part of Homo sapiens femur zone of long bone pectinal line of femur 2026-03-19T00:00:00Z A zone of bone organ forming a raised ridge on the posterior surface of the proximal femoral shaft, running obliquely from the base of the lesser trochanter to the medial lip of the linea aspera. It serves as the insertion site for the pectineus muscle. David Osumi-Sutherland