Rib - 1
Costa - I
Definition
The first rib is the shortest and widest of all the ribs. It forms the cranial boundary of the thorax. It articulates dorsally with the first thoracic vertebra and ventrally with the manubrium of the sternum. Its inner surface, concave, faces the mediastinum, while its outer surface, convex, is directed toward the thoracic wall.
References
Barone R. Anatomie comparée des mammifères domestiques, Tome 1, Ostéologie, 5th edition, Vigot, Paris, 2017.
International Committee on Veterinary Gross Anatomical Nomenclature. 2017. Nomina Anatomica Veterinaria. Sixth Edition. Ghent (Belgium).
