The respiratory system is responsible for providing oxygen to the rest of our body. We’ll discuss the anatomy and function.

One flatworm isn’t bothered by this scenario. After growing back its entire head and brain, it picks off pretty much where it left off. The flatworms here are planarians, a nonparasitic genus.

The hammerhead flatworm is an invasive species that is toxic to the touch for humans. They've been recently spotted again in Houston, Texas after heavy rains. Skip Navigation.