Living: The Allosaurus was a fearsome creature. It could easily hunt down a dinosaur at the size of the Camptosaurus alone.
Vegetarians, which were much larger than the Allosaurus, have maybe been a tough target. But the Allosaurus jumped at the dinosaur and held it with the hands. Then the predator bit it in then throat, and killed the prey. More than 10000 bones were found in Utah, which indicates, that Allosaurus had taken over that area and that they probably patrolled around the in herds.
Skeleton: Like on any other Carnosaur, the Allosaurus had ribs on the neck, and a thigh that was longer than the shinbone.
Skull: Its skull was long, tall and slim, just like the Tyrannosaurus.
Most of the bones where thin and strong, and separated the nostrils from the eyeholes and muscles. The biggest bones supported the teeth and jaw-muscles. The Allosaurus could open its mouth even more than usually, because of its skull-structure. It was then easier for the dinosaur to swallow bigger chunk of meat.
Feet: The Allosaurus had a scaly foot, just like the present non-flying birds. The claws were made of bone with a shell of horn.
