ECHINODERM
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
