Echinodersm
What phylum are starfish, sand dollars, sea urchins in?
Echinoderma
What phylum are vertebrates in?
Chordata
Which echinoderm is poisonous?
sea urchins
Name 2 jawless fish
lobe-finned & ray-finned
______________plates in an echinoderm's endoskeleton that can protrude through skin as spines.
ossicles
All chordates have a _________
notochord
Describe how a starfish eats
Name the CLASS of a jawless fish without vertebrae
Myxini
______________a hard plate that opens at the rear and protects the gills
operculum
The word "Echinoderm" means ___________
spiny skin
_____________is another name for a tunicate.
sea squirt
What is the largest class of echinoderms?
Ophiuroidea
___________a flexible lightweight material made of cells surrounded by tough fibers of protein
cartilage
____________gas-filled sac that is used to control buoyancy(ability to float)
swim bladder
Starfish are in the Echinoderm class called_____________
Asteroidea
_______________is a blade-shaped chordate in the subphyla Cephalochordata.
lancelet
What echinoderm has fossils found in the Cambrian period (55.6 million years ago)
sea lillies
________ is a shark's torpedo-shaped body
fusiform
_______________thin, round disks of a bonelike material that grow from pockets in the skin
scales
Many small movable extensions of the water-vascular system called _______________
Tube-feet
What phylum are humans in?
Chordata!
Name two organisms in the CLASS echinoidea
sand dollars & sea urchin
rays have a diamond shape while skates have a triangle shape
rays have stingers
Name all 4 types of fins and each of their jobs
caudal =moves side to side for swimming
dorsal =keep fish upright and moving in straight line
pelvic & pectoral = to change direction or stop