The hand : its mechanism and vital endowments, as evincing design, and illustrating the power, wisdom, and goodness of God . ouring parts, they retain their proper ofi&ces. Inman, these bones lie supported on the ribs, and aredirectly connected with the great apparatus of respiration;but in certain animals, as in the frog, we shall see theribs, as it were, withdrawn, and the bones of theshoulder curiously and mechanically adapted to perform anterior ; in the Coaita (p. 19), we see the great toe assuming the charactersof a thumh, whilst in the fore-paw the thumb is not distinguishable, but ishi
The hand : its mechanism and vital endowments, as evincing design, and illustrating the power, wisdom, and goodness of God . ouring parts, they retain their proper ofi&ces. Inman, these bones lie supported on the ribs, and aredirectly connected with the great apparatus of respiration;but in certain animals, as in the frog, we shall see theribs, as it were, withdrawn, and the bones of theshoulder curiously and mechanically adapted to perform anterior ; in the Coaita (p. 19), we see the great toe assuming the charactersof a thumh, whilst in the fore-paw the thumb is not distinguishable, but ishid in the skin. In short, these paws are not approximations to the hand,corresponding with a higher ingenuitj^, but are adaptations ot the feet to thebranches on which the animals climb and walk. 50 COMPAEATIVE ANATOMY their office, of giving a firm foundation to the extremity,without the support of the thorax. We shall not,however, anticipate the difficulties of the subject; butlook first upon what is more familiar and easy, theshoulder in man, as compared with some of its varietiesin the mammaha. OF THE CLAVICLE *. SCAPULAE AECH OF MAN. The clavicle, or collar bone, (b) runs across from thebreast bone (a) to the tip of the shoulder (e). Thesquare form of the chest, and the free exercise of thehand, are very much owing to this bone. It keeps theshoulders apart from the chest, and throws the action ofthe muscles proceeding from the ribs, upon the armbone; which would otherwise be drawn inwards, andcontract the upper part of the trunk. * A, Triangular portion of the Sternum, or breast-bone, b, e, Clavicle o^collar-boneo c, c, Scapula, or shoulder blade, n, Coracoid process of theScapula. E, Acromion process of the Scapula, forming the tip of the shoulder. CHAP. III. OF THE SHOULDER. 51 If we examine the motions of the anterior extremityin different animals, it will guide us to see why in somethis bone is perfect, and in others, entirely which fly, or dig, or cKmb,
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjecthand, bookyear1874
