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 mole and a wart is that moles are not contagious, but warts are. A mole, or nevus, is a collection of skin pigment cells. When they are small, they look like small brown dots. When the collection is larger, and slightly deeper, it can cause a raised skin colored bump over it.
1 Most of time, there is not a problem with them at all,such as being cancerous. 2  If you have the type of mole called dysplastic nevi, theres a big chancethat it will have to be moved by surgical means.It is very easy for dermatologist to tell the difference between a mole and wart just by examining itclosely.