GUIDED NOTES: PHYLUM ECHINODERMATA
Characteristics
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Larvae have __________________and adults have ________________symmetry
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No head!
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Endoskeleton- _________________________________________________
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Water vascular system
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_____________________________________________________________
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Number of arms is in multiples of ________________
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____________________sexes, sexual reproduction
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Nerve ring
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Open circulatory system
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Body cavity
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Most are carnivorous with a complete digestive tract
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Nervous system is simple looking but these orgs have ____________________
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_______________________________________________________________
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Water Vascular System
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______________________________________________________________
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Tube feet extend when filled with water thru canals
–
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Used for _________________________________________________
Connects to the outside by a pore called the ___________________________
Classes: Asteroidea, Ophiuroidea, Echinoidea, Holothuroidea, Crinoidea
Asteroidea- __________________________________________________
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Slow moving, flexible arms
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Predators of _____________________________ (slow-moving or attached
animals)
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Feed by everting stomach thru mouth
Echinoidea- _________________________________________________
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Round hard endoskeleton with movable spines
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______________________________________________________
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Aristotle’s lantern- ______________________________________
Holothuroidea- ____________________________________________
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Worm like
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___________________________________________________
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___________________________________________________
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Secrete toxins
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Discharge mucus and toxins thru their anus
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_________________________________ thru mouth or anus
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(they’ll grow back)
Ophiuroidea- ________________________________________________
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Arms very flexible and can move quickly
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Deposit feeders
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Largest group of echinos but stay hidden
Crinoidea- _________________________________________________
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Suspension feeders with feathery arms for feeding
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Deep water and either _____________________________________