0 a layer of cells covering all the surfaces of the body except the interior of blood and lymph vessels
In both species the luminal surface of the excretory bladder epithelium is increased by lamellae, and the basal plasma membrane forms invaginations.
Surprisingly, however, there was no other epithelial abnormality except in the vicinity of the worm where the epithelium was flattened.
Like us, the latter authors asserted that the primitive epithelium in schistosomes is embryo derived.
In relation to goblet cell metaplasia of the bile duct epithelium, the bile contains a high content of mucous secretion.
Small proline-rich proteins are cross-bridging proteins in the cornified cell envelopes of stratified squamous epithelia.
The retinal pigment epithelium cytoplasm showed dense bodies and clumps of lipids.
Progressively the primitive epithelium cytoplasm becomes more electron-dense and its syncytial connections with the underlying cells disappear (fig. 3b).
Later these cells progressively flatten, expand and eventually fuse, forming a thin syncytium underlying the primitive epithelium (fig. 3b).
