Flatworms are invertebrates with soft flattened bodies.
Their bodies are composed of just three tissue layers.
https://video.nostr.build/519f63bad9ca4afa2c54149885d4837d690542dac921ad65a4a8b67a421c2c3e.mp4
Many species are able to regenerate any missing organ, which has made planarians a popular model in research of regeneration and stem cell biology.
Flatworms have an incomplete digestive system and don’t have an anus!!
This means that food and wastes arrive and are ejected by the same door.
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