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

abdominal muscle whose fibers run across the abdomen

muscle opens jaw when head is pulled back

ventral leg muscle originating in iliac crest inserts in upper anterior tibia

mid and low back

muscle is found over the shoulder

penn-

muscle originates in maxilla and zygomatic arch; inserts in mandible

originates in clavicle, sternum and ribs; inserts in upper humerus

penn-