pinboned

Pinboned is a term that refers to a type of bone found in the pectoral girdle of certain animals, particularly birds. The term is derived from the Latin words "pinna," meaning feather, and "os," meaning bone. This bone is unique to birds and is not found in any other class of vertebrates. The pinbone is a flat, triangular bone that articulates with the sternum and the humerus, forming the shoulder joint. It is one of the key bones in the pectoral girdle, which also includes the clavicle and the coracoid. The pinbone is responsible for providing attachment points for the powerful flight muscles of birds, allowing them to generate the force necessary for flight. In addition to its role in flight, the pinbone also plays a crucial part in the overall structure and stability of the bird's body. Its unique shape and function make it a fascinating subject of study in the fields of anatomy and evolutionary biology.