Outlines of comparative physiology touching the structure and development of the races of animals, living and extinct : for the use of schools and colleges . Lower surface. Upper surface BONES OF THE HETACAEPUS AND PHALANGES. 147 Fig. 158.* an. Front. whilst the thumb (i) has but two, its middle phalanx being de-ficient, but they are strong-er than those of the fin-gers. [§ 277. The PHALANGESconsist of base (fig. 159)(1), body (2), and head(3) ; they taper from thebase, or upper part of thehead, the intermediate partor body being rounded be-hind, and flat before, withtwo projectinglater
Outlines of comparative physiology touching the structure and development of the races of animals, living and extinct : for the use of schools and colleges . Lower surface. Upper surface BONES OF THE HETACAEPUS AND PHALANGES. 147 Fig. 158.* an. Front. whilst the thumb (i) has but two, its middle phalanx being de-ficient, but they are strong-er than those of the fin-gers. [§ 277. The PHALANGESconsist of base (fig. 159)(1), body (2), and head(3) ; they taper from thebase, or upper part of thehead, the intermediate partor body being rounded be-hind, and flat before, withtwo projectinglateral edgesfor giving attachment tothe sheaths of the ten-dons. [§ 278. In reviewing thestructure of the upper ex-tremity, we have seen thatit consists of a series oflevers joined together, and diminishing progressively in , the arm is longerthan the fore-arm ; the lat-ter is longer than theand each joint hand;of the er than the one which itsucceeds. By this admi-rable arrangement the nu-merous joints in the handpermit that useful instru-ment to vary its motions in athousand different ways, toadapt it to the various bo-dies itis designed to handle,grasp, and touch; whilst thelong levers formed by thearm and fore-arm allow the han
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectzoology, bookyear1870
