Final answer:
Hookworms live in the human intestine as adults, infecting the host through the skin. They feed on blood from the host's intestinal wall.
Step-by-step explanation:
Hookworms live as adults in the human intestine. They use hooks to attach themselves to the host's tissues. Infection occurs when hookworm larvae enter the host through the skin and migrate to the intestine. Once in the intestine, the larvae mature into adults and lay eggs, which are then passed out of the host in feces. The cycle is repeated when the eggs contaminate the soil and the larvae penetrate the skin of a new host.
Hookworms feed on blood from the host's intestinal wall, which can potentially cause anemia. They have a fairly complex life cycle, involving different stages of development and migration through the host's body.