. Evidence as to man's place in nature . the artisans of Bengal to weave, and the Carajasto steal fishhooks by its help; though, after all, it must berecollected that the structure of its joints and the arrange-ment of its bones, necessarily render its prehensile action farless perfect than that of the tlmmb. But to gain a precise conception of the resemblances anddifferences of the hand and foot, and of the distinctive charac-ters of each, we must look below tlic skin, and compare thebony framework and its motor apparatus in each (Fig. 19). The skeleton of the hand exhibits in tlie region whi
. Evidence as to man's place in nature . the artisans of Bengal to weave, and the Carajasto steal fishhooks by its help; though, after all, it must berecollected that the structure of its joints and the arrange-ment of its bones, necessarily render its prehensile action farless perfect than that of the tlmmb. But to gain a precise conception of the resemblances anddifferences of the hand and foot, and of the distinctive charac-ters of each, we must look below tlic skin, and compare thebony framework and its motor apparatus in each (Fig. 19). The skeleton of the hand exhibits in tlie region which weterm the wrist, and which is technically called the carpus— 87 two rows of closely fitted polygonal bones, four in eacli row,which are tolerably equal in size. The bones of the first rowwith the bones of the forearm, form the wrist joint, and arearranged side by side, no one greatly exceeding or overlappingthe rest. Three of the bones of the second row of the carpus bear thefour long bones which support the palm of the hand. The. Hcmd. Fact Fig. 19.—The skeleton of the Hand and Foot of Man reduced from Dr. Cartersdi-awmgs in Grays Anatomy. The hand is drawn to a larger scale than thefoot. The line a a in the hand indicates the boundary between the carpus and themetacarpus ; b b that between the latter and the proximal phalanges ; e c marksthe ends of the distal phalanges. The line a a in the foot indicates the boundarybetween the tarsus and metatarsus; b b marks that between the metatarsus andthe proximal phalanges; and <;cbounds the ends of the distal phalanges: ca,the calcaneimi; as, the astragalus ; se, the scaphoid bone in the tarsus. 88 fifth bone of the same character is articulated in a much morefree and moveable manner than the others, with its carpalbone, and forms the base of the thumb. These are calledmetacarpal bones, and they carry the phalanges, or bones ofthe digits, of which there are two in the thumb, and three ineach of the fingers. The skeleton of
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Keywords: ., bookcentury1800, bookdecade1860, bookpublisherlondonwilliamsandn
