The Caiman crocodilus , popularly known as alligator is a species of crocodilian, which has crest or "forehead" described "in crescent shape", observed, immediately, dorsal in relation to the eyes, well above region snout, with an ossified crust rostral orbicular region. present study aimed describe muscular anatomy thorax emphasis on thoracoappendicular muscles, and thoracic limb aid X-Ray (RX...