Trematodes are a type of parasite that live inside humans and animals.

This is a kind of flower.

Parasites live inside the host's body and steal nutrients.

He found out that there was a foreign object inside his body.

This forest is a habitation for many animals.

Many types of animals inhabit this forest.

He sucked the juice with a straw.

Humans can make mistakes.

This world where people live is beautiful, and sometimes harsh.

This old document details the lifestyle of humans.