<P> In humans , the gastrocnemius muscle ( / ˌɡæstrɒkˈniːmiəs / or / ˌɡæstrəkˈniːmiəs / ; plural gastrocnemii ; Latin , from Greek γαστήρ `` stomach '' and κνήμη ( knḗmē ) `` leg '' ; meaning `` stomach of leg '' ( referring to the bulging shape of the calf ) is a very powerful superficial bipennate muscle that is in the back part of the lower leg . It runs from its two heads just above the knee to the heel , a two joint muscle . </P>
what is the scientific name for the calf muscle
gastrocnemius muscle