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Phylum Annelida: the segmented worms
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Күн бұрынAnnelids represent a group of marine, freshwater, and terrestrial triploblastic coelomate worms. Most are free-living. This group is the first we see with a circulatory system and more advanced nephridia.
@estimatingonediscoveringthree 2 жыл бұрын
It’s a good thing the worms don’t have blood bound hemoglobin, since they don’t have a true circulatory system and that would be useless
The British Museum
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WIRED
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