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.
Skin Tags vs. Warts vs. Moles. Difference between Skin Tags, Warts and Moles. Human skin is subject to numerous blemishes and unusual conditions, some of the most common of which are skin tags, warts, and moles. Everyone experiences these conditions some time or another, and they are the subjects of this comparison article.