. Quain's Elements of anatomy. true, and the remaining five pairs asternal or false ribs. Ofhese asternal ribs, each of the upper three has its cartilage attached along its superiorborder to the cartilage of the rib above it; while the two last are entirely free fromsuch attachment, and are thence c-dWad floating ribs. 26 THE THORAX. General characters of the ribs.—These are best marked in the ribs near themiddle of the series. The posterior extremity is tliickened, and is termed the head TUBEROSITYNON-ARTICULAR PAR ARTICULAR FACE SUBCOSTAL CROOVE- or capitulum; it presents a superior and an i
. Quain's Elements of anatomy. true, and the remaining five pairs asternal or false ribs. Ofhese asternal ribs, each of the upper three has its cartilage attached along its superiorborder to the cartilage of the rib above it; while the two last are entirely free fromsuch attachment, and are thence c-dWad floating ribs. 26 THE THORAX. General characters of the ribs.—These are best marked in the ribs near themiddle of the series. The posterior extremity is tliickened, and is termed the head TUBEROSITYNON-ARTICULAR PAR ARTICULAR FACE SUBCOSTAL CROOVE- or capitulum; it presents a superior and an inferiorobhque articular surface for articulation with thebodies of two vertebra, and, between them, a slightridge, to which the interarticular ligament is a little distance from the head, and separated fromit by the slightly constricted neck, is the tuherositij,an oval eminence which is divided into two parts byan oblique groove ; the inner part is smooth andarticulates with the transverse process of the lower of. Fii{. 26. -Fifth kib op the eight side, froji behind.(Drawn by D. Gunn.) J y the two vertebra with which the head is connected, while the outer part is rough and serves for the attachment of the posterior costo-transverse ligament. The whole extent beyond the tuberosity constitutes the body. It is laterally compressed, and broader iTom above downwards towards the anterior extremity. Outside the tuberosity, over the most convex part of ihe body, is a rough line which corresponds to the outer border of the erector spinse muscle, and marks the angle, so called because at this point the rib takes a more sudden curve, its direction being now forwards and outwards. The inferior border presents on its inner aspect the subcostal groove, in which lie the intercostal vessels and nerve, and Avhich is best marked opposite the angle and disappears in front. The anterior extremity of each rib is hollowcd at its tip into an oval pit, in which the costal cartilage is im
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishe, booksubjectanatomy
