[An experimental-morphologic study of the regenerative capacity of the nematode Pontonema vulgaris (Bastian, 1865)]

In free esea nematodas Pontonema vulgaris (Bast). end portions were cut off and internal organs were damaged without disturbing the integrity of the cuticle (at the level of the oesophagus, anterior and medial parts of the gut and at the tail level). Reparative processes were registrated under conditions of "closed" traumas only. Removal of degenerating cells and a closure of the wound in the gut was brought about due to the active shift of the intestinal epithelium edges towards one another. The rest of degenerating cells found themselves in the gut lumen and were gradually adsorbed by entodermal cells. A deficiency of the intestinal epithelium cells is made up due to mitotic division of these cells in the epithelium areas adjacent to the site of the trauma. Regeneration in females was found to be more rapid than in males.