Echinoderm - Wikipedia
Echinoderms primarily use their tube feet to move about, though some sea urchins also use their spines. The tube feet typically have a tip shaped like a suction pad in which a vacuum can be created by contraction of muscles. This combines with some stickiness from the secretion of mucus to provide adhesion. The tube feet contract and relax in waves which move along the adherent surf…
Wikipedia · CC-BY-SA 许可下的文字Echinoderms - Smithsonian Ocean
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 …
Echinoderms - MarineBio Conservation Society
They are characterized by a unique radial symmetry and a spiny or prickly outer skin. The name “echinoderm” translates to “ spiny skin,” which describes their appearance. Echinoderms include several familiar organisms such as …
Sea urchin - Wikipedia
Sea urchins move slowly, crawling with their tube feet, and sometimes pushing themselves with their spines. They feed primarily on algae but also eat slow-moving or sessile animals. Their predators include sea otters, starfish, wolf …
Echinoderm - Radial Symmetry, Tube Feet, Spines
2024年9月30日 · Echinoderms exhibit a variety of skeletal structures. In the echinoids, a hollow test (skeleton) consisting of 10 columns of plates bears large and small spines as well as pincerlike organs ( pedicellariae ) used in defense …
Phylum Echinodermata | manoa.hawaii.edu/ExploringOurFluidEarth
Echinoderms are named for the spines or bumps covering the outer surface of the bodies of many of them (Greek root word echino- meaning spiny; Latin root word -derm meaning skin). …
The Wonders of the Seas: Echinoderms - Oceanic …
The sea urchins are well known to most people, having a large number of sharp spines pointing out in all directions. These spines offer protection from many would-be predators. The spines are joined to the skeleton of the animal, …
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, …
The internal morphology of primary spines of extant regular …
2018年8月1日 · A scanning electron micrograph (SEM) atlas of the internal structure of the primary spines of 14 of the most common species of regular echinoids from shallow–water …
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