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38 Cards in this Set
- Front
- Back
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starfish development
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sea stars= asteroidea
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pedicillariae
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ophiurodea
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pluetus larva
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aristotles lantern
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sea urchins echinodea
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echinodea
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sea bsicuit enchinderea
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holothurioidea
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holothurioidea
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feather star, crinoidea
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crinoid fossil
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echinodermata means
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spiny skin
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how many species are in the echinoderms
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7000
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echinoderms are only found, in
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marine habitats
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the reason echinoderms are not found in brackish water or fresh water is they lack
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osmoreguatory system
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echinoderms have this in common with humans
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they are chordates
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what kind of coleom condition is responsible for the formation of a coleum in echinoderms
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enterocoelous
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we know ecinoderms have bilateral symetry because
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larva shows bilateral symetry
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echinoderms show this kind of symetry
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pentamerous
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what is are the two exception to the lack of cephalization in echinoderms
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sea cucumbers and sand dollars
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how do echinoderms move
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tube feet pull them along
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the endoskeeleton has many of these under its skin
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dermal ossicles
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dermal sissicles are
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little pieces of bone
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these are small pincer like organs on the skin
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pedicellarie
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this system is unique to echinoderms and not at all understood
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hemal system
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the nervous system on echinderms is:
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decentralized
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echinoderms are typically _______ reproductivly
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dioecious
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sea stars
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asteroidea
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sea urchins
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echinoderms
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only sea urchins have this organ
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aristotles lantern
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sand dollars
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echinoderms
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brittle stars
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ophiuroidea
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sea cucumbers
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holothuroidea
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crinoids
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crinoidea
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what are the three deutostomes
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-echinoderms
-hemichordates -chordata |
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the major differnce in protosomes and deuterstomes
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-protosomes develop mouth first
-deuterstomes develop ass first |
