Term
Phylum Echinodermata Animals
(7) |
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Definition
Sea stars
Brittle stars
Sand dollars
Sea urchins
Sea cucumbers
Feather stars
Sea lilies |
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Term
Echinodermata Symmetry
(2) |
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Definition
Young (bilateral symmetry)
Adults (pentaradial symmetry) |
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Term
Echinodermata Nervous System
(3) |
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Definition
No head or brain
No use for cephalization
Has nerve ring |
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Term
Echinodermata Skeleton
(2) |
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Definition
Endoskeleton
Composed of calcium carbonate ossicles |
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Term
Echinodermata Dermal Branchiae
(2) |
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Definition
"skin gills"
Allow gas exchange |
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Term
| Echinodermata Respiratory and Circulatory Systems |
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Definition
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Term
| Echinodermata Coelom Evolution |
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Definition
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Term
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Definition
Uses sea water to generate hydraulic pressure
Powers tube feet for locomotion and capturing prey |
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Term
Echinodermata Deuterostomes
(3) |
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Definition
Develops anus first
Exhibit indeterminate development
Cells divide by radial cleavage |
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Term
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Definition
Class Crinoidea (Sea lilies, Feather stars)
Class Ophiuroidea (Brittle stars)
Class Echinoidea (Sea urchins and Sand dollars)
Class Asteroidea (Sea stars)
Class Holothuroidea (Sea cucumbers)
Class
Class |
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Term
Class Crinoidea Structure
(4) |
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Definition
Stalk present, attached to aboral surface
Mouth and anus both present on oral surface
Branched arms w/ feathery pinnules
Madreporite absent |
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Term
Class Ophiuroidea Structure
(4) |
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Definition
Long, slender arms distinct from central disc
Tube feet lack suckers, NOT used for locomotion
No ambulacral grooves
Madreporite on oral surface |
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Term
Class Echinoidea Structure
(4) |
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Definition
Spherical/disc shaped body w/o arms
Endoskeleton plates fused to form test
Tube feet w/ suckers
Well-developed, movable spines |
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Term
| Class Holothuroidea Structure |
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Definition
Soft and cylindrical body w/o arms
Spines absent
Tube feet w/ suckers
Branching tentacles surround mouth
Madreporite internal |
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