Pork ## THREE FIGURES The minion aiid allailtoistwo of the extraembryonic structures of the avian embryopossess dynamic physicochemical systems which provide arid maintain an adeqnate cnviroiixrierit for the developing embryo within tlie egg. Vital and sigiiificant physiological activities occur
Experiments on the development of the amnion in the chick
β Scribed by F. B. Adamstone
- Publisher
- John Wiley and Sons
- Year
- 1948
- Tongue
- English
- Weight
- 672 KB
- Volume
- 83
- Category
- Article
- ISSN
- 0362-2525
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Factors affecting the development of filial preferences in chicks were investigated. Four groups of chicks were hatched and maintained in darkness. When the chicks were 20-hr old, three of these groups were exposed to an overhead light ("primed") for .5 h. When 24-hr old, all groups were placed in r
## Abstract This study provides a quantitative analysis of the active movements of the chick embryo and of the contractions of the amnion over the entire developmental period of 21 days. Four types of embryo movements are distinguished. The motor activity of the embryo shows two characteristic peak