. Comparative embryology of the vertebrates; with 2057 drawings and photos. grouped as 380 illus. Vertebrates -- Embryology; Comparative embryology. MORPHOGENESIS OF MUSCULAR SYSTEM 719 NUCHAL PORTION OF PLATYSMA AND POSTAURICULO-OCCIPITAL MUSCLE GROUP. ZYGOMATICUS ZYGOMATICUS M. TRIANGULARIS M. PLATYSMA Fig. 330. Facial and cervical muscles in mammals derived from the mesoderm of the hyoid arch. (Redrawn from Huber, 1930, Quart. Rev. Biol., 5.) (A) Opossum (Didel- phys). (B) Cat (Felis). (C) New-born baby (white) human. (D) Adult (white) human. fold arose as a support for the fold in a manner
. Comparative embryology of the vertebrates; with 2057 drawings and photos. grouped as 380 illus. Vertebrates -- Embryology; Comparative embryology. MORPHOGENESIS OF MUSCULAR SYSTEM 719 NUCHAL PORTION OF PLATYSMA AND POSTAURICULO-OCCIPITAL MUSCLE GROUP. ZYGOMATICUS ZYGOMATICUS M. TRIANGULARIS M. PLATYSMA Fig. 330. Facial and cervical muscles in mammals derived from the mesoderm of the hyoid arch. (Redrawn from Huber, 1930, Quart. Rev. Biol., 5.) (A) Opossum (Didel- phys). (B) Cat (Felis). (C) New-born baby (white) human. (D) Adult (white) human. fold arose as a support for the fold in a manner similar to the median fins. The latter theory has the greatest number of adherents today. The early development of the rudiments of the paired appendages and the properties of the limb field are discussed in Chapter 10, page 508. Relative to the developing limb; the exact origin of the cells which go to make up its intrinsic musculature has been the object of much study. In the elasmobranch and teleost fishes, muscle buds from the myotomes in the vicinity of the developing fin fold unquestionably contribute dorsal and ventral premuscle masses of cells to the limb, which give origin respectively to 1) the dorsal, elevator and extensor muscles, and 2) the ventral depressor and adductor muscles of the 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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