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.
A wart is a skin growth caused by some types of the virus called the human papillomavirus (HPV) . HPV infects the top layer of skin, usually entering the body in an area of broken skin. The virus causes the top layer of skin to grow rapidly, forming a wart.Most warts go away on their own within months or years.Warts can grow anywhere on the body, and there are different kinds. For example, common warts grow most often on the hands, but they can grow anywhere.ome people are more likely to get warts than others. Warts come in a wide range of shapes and sizes. A wart may be a bump with a rough surface, or it may be flat and smooth. Tiny blood vessels grow into the core of the wart to supply it with blood.