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.
Jupiterimages/Goodshoot/Getty Images. The difference between genital warts and a skin tag is very distinctive. Genital warts are the result of a sexually transmitted disease (STD). A skin tag is the result of age, pregnancy, obesity and heredity. In addition, other factors (such as symptoms) make these two conditions different. Vestibular Papilloma.