ECHINODERM

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Aboral

Dorsal surface of a starfish opposite from the mouth where the anus and madreporite are located

3 things true about starfish

They have separate sexes and external fertilization they have indirect development they reproduce

type of body cavity

coelom

stone canal

connects mafreporite and ring canal

ring canal

connects stone canal with radial canals

wich of the following is true about symmetry in echinoderms?

Larvae have bilateral symmetry Adults have radial symmetry

what are charecteristics shared by all echinoderms

all are marine have tube feet wich help in locomotion, feeding, gas exchange, and excretion

blastropore becomes

anus

ossicles

calcium carbonate plates that make up the skeletons

the ________ stomach in a starfish can be turned inside out through the mouth during feeding

cardiac

reproduction, sexual,asexual,or both?

both

ampullae

bulbs on the tops of the tube feet that control the amount of water entering and leaving the tube feet

parts of the skeletal system

calcium carbonate ossicles

ossicles

calcium carbonate plates that make up the endoskeleton in starfish

fertilization is external or internal?

external

gonads

general term for reproduction organs

spines

give echinoderms their name and provide protection

ambulacral groove

groove on underside of arms that holds the tube feet

Echinoderms are the only

invertebrate deuterostomes

pedicellaria

keeps surface free of foreign objects

ovary

makes eggs

testis

makes sperm

parts of the digestive system?

mouth,cardiac stomach, pyloric stomach, anus, digestive glands

ampulla

muscular bulb that controls water entering tube feet

open or closed circulation

open

madreporite

opening for the water entering the water vascular system

Deuterostome

organism in wich the embryonic blastopore becomes its anus

marine

organisms that live in salt water

type of symmetry?

pentaradial

pedicellaria

pincher like structure between the spines wich helps keep the starfishs body surface free of foreign objects

the function of the water vascular system is to

provide water pressure to operate the tube feet

parts of the water vascular system

radial canal ring canal stone canal madreporite

parts of the nervous system

ring and radial nerves and nerve net

madreporite

sieve like plate on the aboral surface that acts as the opening to the water vascular system

skin gills/tube feet

skin extensions that exchange gases with water

echinoderms exchange gases with the water through their k

skin gills

pentaradial

special kind of radial symmetry seen in sea stars with 5 arms

unique characteristics

spiny skin, water vascular system, pedicellaria

in a starfish the _________ is involved in the absorption of nutrients

stomach

Regeneration

the ability to regrow lost body parts

how waste is excreted

through the anus on the aboral surface and through the water vascular system

how respire

tube feet and skin gills result of diffusion

Oral surface

underside of the starfishs body where the mouth is located


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