1) Calf muscle 
In humans and some other mammals, the soleus is a powerful muscle in the back part of the lower leg (the calf). It runs from just below the knee to the heel, and is involved in standing and walking. It is closely connected to the gastrocnemius muscle and some anatomists consider them to be a single muscle, the triceps surae. Its name is derived fr...
origin, fibula, tibia, tendinous arch between tibia and fibula and passing over popliteal vessels; insertion, calcaneus by Achilles tendon; innervation, tibial nerve; action, plantar flexes foot.
A muscle of the calf.