What are the examples of internal and external parasites?

Internal parasites include organisms like tapeworms, roundworms, and flukes, which live within the host's body, often in the intestines or other organs. External parasites, on the other hand, include ticks, fleas, and lice that live on the surface of the host's body, feeding on blood or skin. Both types of parasites can cause significant health issues for their hosts. Prevention and treatment vary, depending on the type and location of the parasites.