Class Trematoda: Infect the internal organs of hosts. Parasitic Can be endoparasites (live in the host) or ectoparasites (attach to external surfaces of the host. Size: ~ 1 cm to 10 cm Covered in an unciliated cuticle. Usually require 2 hosts to complete it's life cycle.
The Difference Between A Wart And A Mole. Although warts and moles may appear to be the same they are not related conditions. They are thought to be because the often look alike. Warts are defined as small areas of a long. standing viral infection. Moles are described as areas of the skin that are heavily pigmented. with melanin,the substance that is responsible for general skin coloring. Warts will vary in their appearance. Warts are not dangerous but can most definitely become a nuisance.
Warts have a rough texture and are caused by viruses, particularly one of several kinds of HPV (human papillomavirus). The virus causes keratin, which is a hard protein on the top layer of the skin, to grow too fast. Warts are not the same as moles.