A coracoid[a] is a paired bone which is part of the shoulder assembly in all vertebrates except therian mammals (marsupials and placentals). In therian mammals (including humans), a coracoid process is present as part of the scapula, but this is not homologous with the coracoid bone of most other vertebrates. [2]

Mar 28, 2024 · The coracoids’ function is like that of a strut or a column. It is a structural component of the pectoral girdle and works by resisting longitudinal compression of the chest cavity by the pectoral muscles when the wings push down. The coracoids protects the lungs from being crushed by the sternum every upstroke of the wings.

Oct 30, 2023 · The coracoid process is an osseous projection that projects from the upper margin of the scapula. This process is directed anterolaterally and positioned directly inferior to the lateral aspect of the clavicle. It connects with the clavicle via the coracoclavicular ligament.

Feb 21, 2024 · It is a paired bone, meaning chickens have two coracoids, one on the right and one on the left side of the body. The coracoid is situated at the front of the shoulder joint. It connects the breastbone (sternum) to the wing and helps suspend the wing away from the body.

The coracoid process (from Greek κόραξ, raven [1]) is a small hook-like structure on the lateral edge of the superior anterior portion of the scapula (hence: coracoid, or "like a raven's beak"). Pointing laterally forward, it, together with the acromion, serves to stabilize the shoulder joint.

Oct 19, 2012 · We analysed 16 qualitative characters identifiable in the fossil coracoids: apical facet of the head (shape), acrocoracoid crest and acrocoraco-humeral impression (position), brachial tubercle (development), bicipital impression (development), coracobrachial impression (development), subcapital crest (development), glenoid facet (shape ...

Nov 25, 2024 · I have written about coracoids before, but since realizing they are very helpful in the identification process of birds, it has become a bit of an ongoing puzzle now. This post is about finding two dead birds and using their coracoids to sort out who they were with a …

The developmental pattern of the acromion is very similar among embryos, whereas that of the coracoid in mammals differs from that in non-mammals, implying that coracoids are not homologous between non-mammals and mammals.

The bones of the wing include the humerus, radius, ulna, carpal and metacarpal bones, and digits. Proximally, the humerus articulates with the axial skeleton via the pectoral girdle, which in birds includes the paired scapulas, coracoids, and clavicles.

The pectoral arch presents a long, narrow, and recurved scapula (Sc. Fig. 84 1/2), without any suprascapula; and a coracoid (Co.), fitted by its proximal end into the groove in the antero-lateral edge of the sternum.