Sentence Examples

  • Externally, the nephridium opens by a straight part of the tube, which is often very wide, and here the intracellular lumen becomes intercellular.
  • 11, C, tending in fact to obliterate altogether the lumen of the filament.
  • Frequently the lumen is branched and may form a complicated anastomosing network in these cells.
  • The Polychaeta, however, present us with another form of nephridium seen, for example, in Arenicola, where a large funnel leads into a short and wide excretory tube whose lumen is intercellular.
  • In all these cases we have a duct which has a usually wide, always intercellular, lumen, generally, if not always, ciliated, which opens directly into the coelom on the one hand and on to the exterior of the body on the other.

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