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Phylum Echinodermata

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Total cards: 13•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (13)

#1
Front (Question)

Common name

Back (Answer)

Echinoderms “Prickly skin”

#2
Front (Question)

Symmetry

Back (Answer)

Larva- bilateral Adults- pentaradial Triploblastic

#3
Front (Question)

Coelom

Back (Answer)

Eucoelomate

#4
Front (Question)

Skeleton

Back (Answer)

Endoskeleton Calcium carbonate

#5
Front (Question)

Organ systems

Back (Answer)

Water vascular system Ossicles on skin Pedicellaria- defensive organ 2 stomachs

#6
Front (Question)

Habitat

Back (Answer)

Marine

#7
Front (Question)

Reproduction

Back (Answer)

Dioecious Fragmentation

#8
Front (Question)

Fossil history

Back (Answer)

Diverse fossils from Mesozoic, Cambrian, and Paleozoic Fewer species today

#9
Front (Question)

Class asteroidea

Back (Answer)

Sea stars Thick arms Tube feet Central disk Inverted stomach Mullusk carnivore

#10
Front (Question)

Class ophiuroidea

Back (Answer)

Brittle stars Thin long flexible arms for movement Demarcated disk: smaller, no anus Readily automize: drop arms

#11
Front (Question)

Class echinoidea

Back (Answer)

Tube feet for movement Detritivores Aristotle’s lantern: mouth on underside Sea urchins and sand dollar

#12
Front (Question)

Class holothuroidea

Back (Answer)

Elongated axes Respiratory tress’s Tube feet for movement Tentacles for feeding Bilateral adults Sea cucumbers

#13
Front (Question)

Class crinoidea

Back (Answer)

Sessile Branched arms Suspension feeders. Tube feet for feeding Sea lilies and feather stars