Internal parasites thrive in the ________ of a cow's body.

Internal parasites thrive in the intestine of a cow's body. Parasites are organisms that live on other organisms and feed on them. Parasites can be internal as well as external. They can enter into the intestine by going through the mouth when these organisms are swallowed. They move into the intestine where they can reproduce. The environment of intestine facilitates parasite reproduction and growth. External parasites live on the skin, eyes and hairs and cause skin diseases, while internal parasites like worms affect stomach and intestine.