Date of Award

Spring 1990

Document Type



Life & Environmental Sciences

First Advisor

John Addis

Second Advisor

Henry Burgess

Third Advisor

John Christenson


Epithelium and mesenchyme are two distinctive cell types. Transitions occur between these during embryonic development of the mammal and chick. The chick embryo was used as a model system to study the cellular and molecular characteristics defining an epithelium and mesenchymal cell. A procedure was established to prepare serial sections of chick embryos for light microscopy observation. A study of this nature may indicate factors involved in bringing about such cellular transitions and contribute to our knowledge of what occurs in disease processes caused by the loss of a cell's typical morphology.