Scapulocoracoid

Scapulocoracoid is a term used in anatomy to refer to the combined structure of the scapula and coracoid in certain animals, particularly in birds and reptiles. This structure plays a crucial role in the movement and functionality of the wing or forelimb.

Structure

The scapulocoracoid is a single bone that is formed by the fusion of the scapula and the coracoid, two bones that are separate in mammals. The scapula, or shoulder blade, is a large, flat bone located in the upper back, while the coracoid is a smaller bone that extends from the scapula to the front of the shoulder.

In birds, the scapulocoracoid is a robust structure that provides a strong support for the wing. The scapula is long and thin, extending along the side of the ribcage, while the coracoid is a thick, pillar-like bone that extends from the scapula to the sternum. The two bones are fused together to form a single structure that provides a stable base for the wing muscles.

In reptiles, the scapulocoracoid is a similar structure, but it is typically less robust than in birds. The scapula and coracoid are often not as tightly fused together, allowing for more flexibility in the forelimb.

Function

The scapulocoracoid plays a crucial role in the movement of the wing or forelimb. It provides a stable base for the attachment of muscles and acts as a pivot point for the movement of the limb. In birds, the scapulocoracoid is particularly important for flight, as it provides the necessary support and stability for the powerful wing muscles.

See also

• Scapula
• Coracoid
• Bird anatomy
• Reptile anatomy