cell death, x-irradiation, histological study, embryonic chicken mandible
The sensitive period for the induction by x-irradiation of reduced mandibles in chick embryos was determined to be during the 5th day of incubation. Variations in mandibular anomalies can be correlated with the incidence and frequency of cell deaths. As exhibited by control mandibles, cell deaths around the distal ends of Meckel' s cartilages through the 7th day may aid distal cartilage elongation. The variety of anomalies resulting from teratogenic doses is due, in part, to differences in sensitivity between embryos and their ability to recover from radiation damage. Bone development (initial ossification) in experimental embryos was retarded from 12 to 24 hours. The mandibular bones of the experimental embryos conformed to the abnormally curved and/or bent cartilage; membrane bones were shortened and blunted in their long dimensions.
Proceedings of the Iowa Academy of Science
©1979 Iowa Academy of Science, Inc.
Bailey Walton, Barbara Ann
"Histology of the Embryonic Chick Mandible Following X-Irradiation,"
Proceedings of the Iowa Academy of Science, 86(4), 121-128.
Available at: https://scholarworks.uni.edu/pias/vol86/iss4/3