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The head-process and the formation of the definitive endoderm in the mouse embryo
The formation of the secondary or definitive endoderm was studied by light microscopy (1-μm sections) and (scanning) electron microscopy. The results...
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The formation of the embryonic mesoderm in the early post-implantation mouse embryo
The formation of the mesoderm in early post-implantation mouse embryos is described and analysed. The outgrowth of the mesoderm was found to depend...
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Changes in S-phase associated with differentiation of mouse embryos in culture from blastocyst to early somite stage
Mouse embryos, cultured for 8 days from the blastocyst (stage 5 of Theiler, 1972) to the 10–12 somite stage (stage 13) were labeled at daily...
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The retina-lamina projection in the crab Leptograpsus variegatus
In the crab, Leptograpsus variegatus , the projection of retinula cell axons to the lamina was investigated by tracing them through a series of...
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Graphische Methoden in der Datenanalyse
Data analysis is concerned with attentive description and communication of the information contents of a body of data. Background information,...
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Artificial neural induction in amphibia
1. Embryonic tissue of Triturus (ectoderm, neural plate) was killed with hot water and implanted into the blastocoel of young gastrulae. It induces...
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Population Genetics and Health Care Delivery: The Quebec Experience
The main objective of this chapter is to define the potentialities for genetic studies in the French Canadians. Different levels of approach to the... -
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Follicle formation in the embryonic chick thyroid
The events which occur after reaggregation of dissociated embryonic chick thyroid cells are described. Although the cells rearrange themselves into...
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Ultrastructure of the pars distalis of the lizard Anolis carolinensis with special reference to the identification of the gonadotropic cell
Five categories of granulated cells were distinguished by their ultrastructural features, and quantitative analyses were made of the pars distalis...
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Monoamine Innervation of Cerebral Cortex and a Theory of the Role of Monoamines in Cerebral Cortex and Basal Ganglia
The historical development of interest in the monoamine innervation of cerebral cortex is highlighted by several key discoveries that have changed...