What are endoparasites?

Endoparasites are defined as organisms that live inside the body of their host. This typically includes various types of worms, such as roundworms, tapeworms, and flukes, as well as some protozoa. By residing within the host, endoparasites are able to access nutrients directly from the host's body, often leading to adverse health effects for the host, such as nutritional deficiencies, inflammation, or immune system reactions.

In contrast to endoparasites, ectoparasites dwell on the external surface of their hosts, which is the premise for the incorrect choice. The notion that some parasites do not affect their hosts or are exclusive to wild environments further highlights a misunderstanding of parasitic relationships, as most endoparasites are specifically adapted to exploit the resources of their hosts, thus having significant impacts on their health and well-being.