penn-

muscle originates at base of femur and inserts in bones of heel

muscle originates at base of femur and inserts in bones of heel

muscle originates in maxilla and zygomatic arch; inserts in mandible

posterior upper arm

posterior upper arm

muscle of anterior lower leg

muscle opens jaw when head is pulled back

dorsal lower trunk muscle; extends the hip in walking

originates in thoracic, lumbar and sacral vertebrae and crest of ilium; inserts in head of humerus