Nemerteans have a superficial resemblance to Annelids, they share a multiciliated glandular epidermis, protonephridia, spiral cleavage, and the ladder-like nervous system. But have clear differences which include a circular cross-section, a complete gut, a unique blood-vascular system with and endothelium, the proboscis, and the presence of a coelom (rhynchocoel).
The Nemertea also have superficial resemblance to the Nematodes. Only they have complex circular and longitudinal muscles and don’t molt.
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