what is the main muscle of the thigh
Quadriceps femoris muscle The quadriceps femoris (/ˈkwɒdrɪsɛps ˈfɛmərɪs/, also called the quadriceps extensor, quadriceps or quads), is a large muscle group that includes the four prevailing muscles on the front of the thigh.
Femoral artery The femoral artery is a large artery in the thigh and the main arterial supply to the leg. It enters the thigh from behind the inguinal ligament as the common femoral artery, a continuation of the external iliac artery. Injuries to the femoral artery can require reattachment surgery.[citation needed]