. Human embryology and morphology. Embryology, Human; Morphology. THE LIMBS. 303 form the lower part of the extremities. In ruminants the 3rd and 4th digits have become specialized ; the rest of the digits have become reduced until only traces of them are left; in rodents radius or tibia. radiate or tibiale. carpal V. meta-carp,... ulna or fibula, intermedium ulnare orfibulare carpal I. centrale carpal III. Pig. 246.—The Carpal Bones of a Tortoise. the hallux is vestigial. The hallux and pollux are the mammalian digits most liable to undergo retrogression. In man, on the other hand, the hallux
. Human embryology and morphology. Embryology, Human; Morphology. THE LIMBS. 303 form the lower part of the extremities. In ruminants the 3rd and 4th digits have become specialized ; the rest of the digits have become reduced until only traces of them are left; in rodents radius or tibia. radiate or tibiale. carpal V. meta-carp,... ulna or fibula, intermedium ulnare orfibulare carpal I. centrale carpal III. Pig. 246.—The Carpal Bones of a Tortoise. the hallux is vestigial. The hallux and pollux are the mammalian digits most liable to undergo retrogression. In man, on the other hand, the hallux and pollux find their greatest development. Comparison of the Tarsus and Carpus.—Both are the de- rivatives of such a typical form as is shown in Fig. 246. In the typical tarsus or carpus there occur the following bones: 1. Radiale or Tibiale forms the scaphoid in the hand and astragalus in the foot. os ealcis (fibulare) os trigonum {intermedium) astrag. (tibiale) cuboid()-J^ -scaphoid (centmle) Fra. 247.—The Os Trigonum and Bones of the Tarsus. 2. Intermedium forms the semilunar in the hand; in the foot it is much reduced and usually unites with the astragalus to form. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Keith, Arthur, Sir, 1866-1955. London : E. Arnold
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectembryol, bookyear1902
