I found a pill bug in the garden.

Pinworms can parasitize the human body.

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

The insect lives by parasitizing plants.

Parasitism is a part of nature and a form of interaction between organisms.

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

Humans can make mistakes.

This old document details the lifestyle of humans.

My biological clock is completely messed up.

This parasite lives inside the human body.