. Comparative embryology of the vertebrates; with 2057 drawings and photos. grouped as 380 illus. Vertebrates -- Embryology; Comparative embryology. 712 THE MUSCULAR SYSTEM not tolerate this view, but believes, in the chick at least, that the dermatome gives origin to dermal mesenchyme. The primitive position of the myotome is lateral to the nerve cord and notochord. As development progresses, the individual myotomes grow ven- trally toward the midventral line (fig. 327A). As this downgrowth progresses, each myotome becomes separated into dorsal (epaxial) and ventral (hypaxial) segments (fig.
. Comparative embryology of the vertebrates; with 2057 drawings and photos. grouped as 380 illus. Vertebrates -- Embryology; Comparative embryology. 712 THE MUSCULAR SYSTEM not tolerate this view, but believes, in the chick at least, that the dermatome gives origin to dermal mesenchyme. The primitive position of the myotome is lateral to the nerve cord and notochord. As development progresses, the individual myotomes grow ven- trally toward the midventral line (fig. 327A). As this downgrowth progresses, each myotome becomes separated into dorsal (epaxial) and ventral (hypaxial) segments (fig. 328A). As indicated above and in figure 326D, the ribs grow MANDIBULAR SWE EXTERNA HYOID SWELLING EXTERNAL EXTERNAL AUD MEATUS. LATISSIMUS OORSI EXTERNAL OBLIQUE RECTUS ABDOMINIS SACROSPINALIS BENEATH LUMBO - DORSAL FASCIA SARTORIUS QUADRICEPS FEMORIS TENSOR FASCIAE LATA GLUTEUS MEDIUS BICEPS FEMORIS GLUTEUS MAXIMUS 20MM /WEEKS UMBILICAL ARTERIES UMBILICAL VEIN TIBIALIS ANTICUS ___ EXTENSOR -^ % H ALLUCIS LONGUS ^», i-^d EXTENSOR \ia? ' DIGITORUM LONGUS Fig. 329. Later development of musculature in human embryo. (A after Bardeen and Lewis, 1901. Am. J. 1.) (A) Limb and superficial trunk musculature of 20-mm human 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 Nelsen, Olin E. (Olin Everett), b. 1898. New York, Blakiston
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Keywords: ., bookcentury1900, bookcollectionameri, bookcollectionbiodiversity
