Book 8
1
Below the neck the highest rib is placed on a level with the shoulders; after that there are six lower ribs, reaching as far as the bottom of the thorax; the ribs, which in their first part are rounded and end in small heads, as it were, are lightly fixed to the transverse processes of the vertebrae, which themselves have slight depressions; then the ribs flatten out and after curving outwards gradually degenerate into cartilage, and here, after again bending slightly inwards, they become united to the breast-bone. This, a strong and hard bone, begins below the throat, is lunated on each side, and, when it becomes itself softened into cartilage, is bounded by the praecordia. Below the upper ribs, there are five called by the Greeks nothae; they are short, thinner, and after changing gradually into cartilage, they are embedded in the highest part of the abdomen. The lowest of these consists for the most part only of cartilage. Again, from the neck two wide bones extend to the shoulders on each side; we call them scutula operta, the Greeks omoplatae. These bones are curved at their highest point, and below these they are triangular, and become gradually wider as they approach the spine. As they become wider, they become blunter. And they too at the lowest part soften into cartilage at the back and float, as it were, since they are unconnected with any other bone except at the top, but there they held in place by very strong muscles and sinews. Now at the level of the first rib, and a little behind its middle, a bone grows out which at first is slight but as it comes nearer the broad bone of the shoulder-blades becomes thicker and broader, and curves slightly outwards; and this at its other upper end is enlarged somewhat to support the root of the neck. But this bone itself is curved, and must not be reckoned among the hardest or most solid, and it lies with one head fixed as just stated, the other in a small depression of the breast-bone; it moves a little with the movement of the arm, and is connected with the flat bone of the shoulder-blades by sinews and cartilage.
