- Biceps femoris GastrocnemIus, tendon Medial su bursa of gas lateral head Semimembral Semimembrane Oblique pop Popliteal fossa (Popliteal fascia) Gastrocnemius 胭窝的顶 Fascia of leg; 胭窝的境界 Boundarys of Popliteal Fossa腘窝的边界底 腘窝的境界 Boundarys of Popliteal Fossa 腘窝的顶