Planaria worms, also known as flatworms, are a type of invertebrate animal that belong to the phylum Platyhelminthes. They are often found in freshwater environments and have a flat, elongated body that is typically a few millimeters to a few centimeters in length. Planaria worms are known for their remarkable regenerative abilities, and can regenerate their entire body from just a small fragment.
Planaria worms have a simple digestive system and are able to absorb nutrients directly through their skin. They also have a rudimentary nervous system, with a network of nerve cells that allow them to sense their environment and respond to stimuli.
In addition to their regenerative abilities, planaria worms are also important model organisms in biological research. They have been used to study a variety of topics, including genetics, stem cell biology, and neurobiology.
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