Echinoderms Flashcards
means spiny skinned
Echinoderm
A Skelton inside for support and structure
Endoskeleton
a defensive organ
Pedicellariae
perforated plate by which the entry of seawater into the vascular system
Madreporite
runs through a sea stars arms part of its water vascular system
Radial canal-
a circle canal under the plate of the sea stars center
Ring Canal
facncy arm name for a seastar
ray
symmetry around a central axis
radial cemetery
divisible into symmetrical halves on either side of a unique plane
bilateral Cemetery
the water pump system in a sea star
Water vascular system
extends from the mouth to the end of each ray or arm.
Ambulacral
a small piece of calcified material forming part of the skeleton of an invertebrate animal
ossicles
limit the passage of large food particles or undigested material into the intestine.
pyloric stomach
reproductive glands in a sea star
gonads
starfish uses uses this special tube to move
tube feet
External Fertilization
External fertilization is a male organism’s sperm fertilizing a female organism’s egg outside of the female’s body.
to regrow a removed limb
regeneration
5 limbs thicker / dissected
sea star
large poky looking ball eats kelp
sea urchin
round shell found on beach
sand dollar
fluffy looking plant
sea Lilly
looks like a feather sea star
feather star
leather poky skinnked looking worm
sea cumber
looks like underwater sunflowers
sea daisy
Pyloric Caecum-
This organ with fingerlike projections is located near the junction of the stomach and the intestines. Its function is not entirely understood, but it is known to secrete enzymes that aid in digestion
which is a sack like stomach located at the center of the body may be everted
Cardiac stomoch
store the water
Ampulla
located in the center contains the mouth of the starfish
Central Disc-
