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.
Warts are generally caused by a human virus known as papilloma while moles are generally related with age and caused by hormones and environmental factors. There are cases when kids are born with moles but in general moles on the face increase with increase in age.
A wart is a small growth on the skin that develops when the skin is infected by a virus. Warts can develop anywhere on the foot, but they typically appear on the bottom (plantar side) of the foot. Plantar warts most commonly occur in children, adolescents and the elderly. There are two types of plantar warts: