Figure 33: TEM of tegument covering invagination canal of Cysticercus pisiformis. One-week-old tegument showing undifferentiated small projection (arrows) extending from the apical plasma membrane, circular (CM) and vertical (VM) muscles enclosing vesicles (V) of variable-sized electrondense bodies (DB), and numerous irregularly scattered tegumental cells (TC). Note the parenchymal matrix encloses parenchymal cells (PC) with large nucleus (N).