Endoskeleton of Cyclostomata animals in _______________.
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The exoskeleton is absent. The endoskeleton is cartilaginous with no bones. The notochord is present throughout their lives. The digestive system is devoid of any stomach.
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Morphologically, they resemble eels. They are known to be the only living vertebrates without true jaws, hence called Agnatha. Cyclostomata includes hagfishes and lampreys.
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