Air sac cannulas are indicated in birds with upper respiratory obstruction or for ventilation during surgical procedures involving the head and neck. Proper technique, knowledge of potential ...

It also connects to the bird’s air sac system, which, in turn, connects to its lungs. The powerful flight muscles of the shoulder attach to the keel, a special ridge of bone that runs down the ...

Aside from their strange horns, these birds also possess some interesting anatomy below the surface. Inside their bones and skin are tons of tiny air sacs that reduce the weight of these large ...