Figure 2.
Formation of duct bundles anteriorly from the acetabulum in T. regenti cercaria. Longitudinal section in TEM; ducts of postacetabular and circumacetabular glands are grouped in two lateral bundles which are in a close contact at this point. CA, anterior pair of circumacetabular cells; dPA, postacetabular ducts; dCA, circumacetabular ducts; MC, posterior end of the muscular conus of the head organ; scale bar = 5 μm.