- Echinoderms possess an unusual suite of appendages on their skeletons, which are used for movement, interaction, and defense. In addition to spines, urchins and sea stars both possess pedicellariae (singular pedicellaria) which are jaw-like structures often at the end of stalks.ocean.si.edu/ocean-life/invertebrates/echinoderms
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仅显示来自 wildlifeinformer.com 的搜索结果Regrow Lost Limbs
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Invertebrates
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A radical evolutionary makeover gave echinoderms …
2023年11月1日 · Echinoderms such as starfish are unusual for their five-fold body symmetry. Maps of gene-expression patterns show how this body plan was acquired, and that the genes specifying head structures...
Echinoderm - Wikipedia
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Echinoderm | Definition, Characteristics, Species,
2024年9月30日 · Echinoderm, any of a variety of invertebrate marine animals belonging to the phylum Echinodermata, characterized by a hard, spiny covering or skin. Living species include sea lilies, sea urchins, sea cucumbers, …
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2020年7月6日 · The rich early fossil record of the echinoderms reveals surprisingly dynamic patterns of body plan evolution and suggests that currently popular theories about how the major features of the animal originated and …
All About Echinoderms - Ocean Conservancy
2024年4月3日 · Echinoderms have a unique water vascular system that allows for their movement. They can suck sea water up through their bodies and control its flow through several tiny tube feet, controlling how these feet expand and …