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.
Here is how to tell the difference: 1  Skin tags typically hang off the skin, while warts are often flattened or cauliflower-like. 2  The surface of a skin tag is very smooth, warts are most often rough and uneven. 3  Skin tags look exactly like what they are, a buildup of extra skin in one area.