T. Clark Brelje, Ph.D.
University of Minnesota
Department of Genetics, Cell Biology and Development
6-160 Jackson Hall
321 Church St SE
Minneapolis, MN 55455
Robert L. Sorenson, Ph.D.
University of Minnesota
Department of Genetics, Cell Biology and Development
6-160 Jackson Hall
321 Church St SE
Minneapolis, MN 55455
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Surface of the gallbladder as seen by scanning electron microscopy (SEM). It is lined by a single layer of columnar cells with microvilli on their apical surface. The basal lamina underneath the epithelium is exposed where some cells have been removed.
Simple Columnar Epithelium (blue)
Microvilli (blue)
Basal Lamina (purple) - network of reticular collagen IV fibrils that separates the epithelium from the underlying connective tissue.