Hemolymph cells and the platelet-like structures of the land slug, Incilaria bilineata (Gastropoda: Pulmonata).
3 morphologically distinct hemolymph cell-types, Types I, II and III, were found by light and electron microscopy of hemolymph from the land slug, Incilaria bilineata. In addition, vast numbers of the platelet-like structures were present in the collected hemolymph. Type I cells were macrophage-like, Type II cells were lymphocyte-like and Type III cells were fibroblast-like. Among these hemolymph cells, only Type I cells could recognize foreign materials and phagocytose them. Type I cells, whether from circulating hemolymph or from the heart-kidney region (regarded as a hemopoietic organ), could be maintained for only 4 d in cultivation because the cells gradually divided within 3 or 4 d. Thus, the platelet-like structures appear to be derived from Type I cells, which readily fragmentize and function by clamping onto foreign materials.
Furuta
E
E
Department of Anatomy, Dokkyo University School of Medicine, Tochigi, Japan.
Yamaguchi
K
K
Shimozawa
A
A
D000818:Animals; D001792:Blood Platelets / Q000166:cytology* / Q000648:ultrastructure; D002448:Cell Adhesion; D006458:Hemolymph / Q000166:cytology*; D008854:Microscopy, Electron; D008855:Microscopy, Electron, Scanning; D008863:Microspheres; D008974:Mollusca / Q000166:cytology*; D010587:Phagocytosis