![]() ![]() ![]() Stevenson.įigure 5.2 A typical trematode ( Fasciola hepatica). They are leaf-shaped and unsegmented (see Figure 5.2).įigure 5.1 A typical tapeworm ( Taenia saginata). In contrast, trematodes do have a mouth and internal digestive system. They have no alimentary tract and absorb nutrients through the tegument. Adult cestodes are segmented and ribbon-like, reminiscent of a tape-measure – hence the traditional name ‘tapeworm’ (see Figure 5.1). The term platyhelminth (meaning ‘flatworm’) encompasses two major parasitic groups: the Cestoda (tapeworms) and the Trematoda (flukes). ![]() The body surface (‘tegument’) is metabolically active and therefore structurally and functionally distinct from the arthropod exoskeleton, the cuticle of nematodes or mammalian skin. each individual has male and female sex organs). Platyhelminths typically have a flattened body with suckers, or similar structures, for attachment to their host. ![]()
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