A tape worm is composed of:
Eggs and gravid proglottids are passed in the feces of the host. When ingested, they hatch in the gut of the new host, invade the blood stream, and then encyst, primarily in muscle tissue. When a carnivore eats infected tissue, the encysted larvae complete the life cycle, by developing into mature tapeworms in the small intestine.
Human Origins: Are we hybrids?
On the Origins of New Forms of Life
Cat-rabbit Hybrids: Fact or fiction?
Georges Cuvier: A Biography
Prothero: A Rebuttal
Branches of Biology