. The development of the human body : a manual of human embryology. Embryology; Embryo, Non-Mammalian. DEVELOPMENT OF THE VERTEBRA 163 unite at an early stage. In the upper five or six vertebrae a relatively large interval persists between the rib and the transverse process, forming the costo-transverse foramen, through which the vertebral vessels pass, but in the seventh vertebra the fusion is more extensive and the foramen is very small and hardly noticeable. In the thoracic region the ribs reach their greatest development, the upper eight or â \;-^Z ... --â. Fig. 9,8.âLongitudinal Section t
. The development of the human body : a manual of human embryology. Embryology; Embryo, Non-Mammalian. DEVELOPMENT OF THE VERTEBRA 163 unite at an early stage. In the upper five or six vertebrae a relatively large interval persists between the rib and the transverse process, forming the costo-transverse foramen, through which the vertebral vessels pass, but in the seventh vertebra the fusion is more extensive and the foramen is very small and hardly noticeable. In the thoracic region the ribs reach their greatest development, the upper eight or â \;-^Z ... --â. Fig. 9,8.âLongitudinal Section through the Occipital Region and Upper Cervical Vertebrae of a Calf Embryo of mm. has, Basilar artery; ch, notochord; Kcl~4, vertebral centra; lc2~4, intervertebral disks; occ, basioccipital; Scx~4, hypochordal bars.â(Froriep.) nine extending almost to the mid-ventral line, where their extremities unite to form a longitudinal cartilaginous bar from which the sternum develops (see p. 166). The lower three or four thoracic ribs are successively shorter, however, and lead to the condition found in the lumbar vertebras, where they are again greatly reduced and firmly united with the transverse processes, the union being so close that only the tips of the latter can be distinguished, forming what are known as the accessory tubercles. In the sacral region the ribs. 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 McMurrich, J. Playfair (James Playfair), 1859-1939. Philadelphia : P. Blakiston's son & co.
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Keywords: ., bookautho, bookcentury1900, bookdecade1910, booksubjectembryology
