. Quain's Elements of anatomy. e of the firstthree false ribs becomes slender towards its extremity, and is attached to the lowerborder of that which is next above it. The eleventh and twelfth are pointed andunattached. The fifth, sixth, se\euth, aud eighth cartilages form a series of inter-chondraJ arficulaiions, by means of a broad process sent down from the rounded ano-leof the one meeting a less salient projection from the upper border of the next. Varieties.—The eig^hth corital cartilage not unfrequently articulates with the the seventh costal cartilage fa
. Quain's Elements of anatomy. e of the firstthree false ribs becomes slender towards its extremity, and is attached to the lowerborder of that which is next above it. The eleventh and twelfth are pointed andunattached. The fifth, sixth, se\euth, aud eighth cartilages form a series of inter-chondraJ arficulaiions, by means of a broad process sent down from the rounded ano-leof the one meeting a less salient projection from the upper border of the next. Varieties.—The eig^hth corital cartilage not unfrequently articulates with the the seventh costal cartilage fails to reach the mesosternum (owing to reductionof the latter), and meets its fellow in front of the ensiform process. The articulationbetween the fifth aud sixth cartilages is sometimes wanting, and then one may be formedbetween the eighth aud ninth. THE THORAX AS A WHOLE. The bony thorax is of a somewhat conical shape, flattened from before back, andmuch longer behind than in front. The posterior wall, formed by the dorsal. Fig. 29.—Front view of the thor.^x. 1. manubrium ; 2, is close to the place of union of thefiist costal cartilage; 3, clavicular notch ; 4, body of thesternum : 5, ensiform process ; 6, groove on the lowerborder of the ribs ; 7, the vertebral end of the rilis ; 8, neck ;9, tuberosity; 10, cartilage; 12, first rib; 13. itstuberosity ; 1-1, first dorsal vertebra ; 15, eleventh rib ; 16,twelfth rib. vertebrae and the ribs, is convex from above down, and, the ribs being directed backwards from the vertebrte as far as their angles, a broad furrow is produced on each side of the spines,which lodges the erector spinte muscle. The anterior wall, formed by the sternum and costal cartilages, is only slightly convex, and is inclined at an angle of 20° to 25° with the vertical. In the condition of expiration the upper border of the sternum is opposite the disc between the second and third dorsal vertebrae, the junction of the manubrium and body opposite t
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishe, booksubjectanatomy
