Pinworm
The pinworm is a parasite, and an intestinal parasite in humans. They can range from 5 through 10 millimeters in length and can reproduce extremely quickly. A female worm can expel 10,000 eggs at a time on the human anus. The nervous system of this organism is rudimentary, with a nerve ring in the head and the peripheral nerves running down the body. Since it is a parasite, it does not need extensive organs for survival.
The pinworm is a parasite, and an intestinal parasite in humans. They can range from 5 through 10 millimeters in length and can reproduce extremely quickly. A female worm can expel 10,000 eggs at a time on the human anus. The nervous system of this organism is rudimentary, with a nerve ring in the head and the peripheral nerves running down the body. Since it is a parasite, it does not need extensive organs for survival.