[A scanning electron microscopy study of the normal rabbit appendix]

The surface relief of the mucous membrane of the normal rabbit appendix was studied under scanning electron microscopy. Two different types of surface relief were identified. One consisted of relatively regular crests and grooves of the mucosa, the other one exhibited scattered crater-like openings into which "heads of lymphatic nodes" were inserted to varying extent and which were separated from the surface mucosa by broad alveolar cavities. Since adequate terminology has not yet been coined for the description of the observed structures, the authors use the terminology of classical histology and from analogous descriptions of other reliefs.