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Chick cephalogenesis. The normal development of the cephalic region of stages 3 through 11 chick embryos
Author(s) -
Hillman Nina W.,
Hillman Ralph
Publication year - 1965
Publication title -
journal of morphology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.652
H-Index - 74
eISSN - 1097-4687
pISSN - 0362-2525
DOI - 10.1002/jmor.1051160304
Subject(s) - notochord , biology , ectoderm , anatomy , mesoderm , hindbrain , forebrain , embryo , endoderm , neuroectoderm , neural plate , embryogenesis , embryonic stem cell , microbiology and biotechnology , genetics , endocrinology , central nervous system , gene
The cephalogenesis of chick embryos was studied at stages 3 through 11 inclusive. Ten embryos were examined at each stage. Particular attention was paid to the time of appearance of the prechordal plate mesoderm and cephalic notochord. It was found that the presumptive neural ectoderm begins to differentiate to form medullary plate as soon as it becomes associated with the chordamesoderm. Histological studies revealed the similarity of the notochord underlying the presumptive forebrain and midbrain regions, and the differences between this notochord and that associated with the hindbrain. These differences included the notochord histology and time of separation of the notochord from entoderm and neural ectoderm.