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Mean weights of chick embryos correlated with the stages of Hamburger and Hamilton

✍ Scribed by J. E. Davis Jr.; Norman E. Garrison

Publisher
John Wiley and Sons
Year
1968
Tongue
English
Weight
244 KB
Volume
124
Category
Article
ISSN
0362-2525

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✦ Synopsis

A total of 1125 normal chick embryos, representing 25 each of the 45 stages of Hamburger and Hamilton, were removed, fixed i n Bouin's solution, stored in 70% ethanol and weighed with a semi-micro analytical balance. Entire blastoderms of stages 1-8 were weighed, whereas only embryos-proper were weighed in stages 9-45. As a consequence, results constituted two groups, each of which showed a geometric rate of growth marked only by minor deviations which were related to specific events of normal growth and development.

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Chick cephalogenesis. The normal develop
Chick cephalogenesis. The normal development of the cephalic region of stages 3 through 11 chick embryos
✍ Nina W. Hillman; Ralph Hillman πŸ“‚ Article πŸ“… 1965 πŸ› John Wiley and Sons 🌐 English βš– 968 KB

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 diff