Unit 4 Test Flashcards
Echino?
Hedgehog
Derma?
Skin
What are echinoderms the skin filled of?
Ossicles
Chrino?
Lilies
Idea?
In the form of
What echinoderm is the most ancient and is seditary?
Chinoidea
How do astreozoa and echinozoa move?
Water vascular system
Water goes through the madreporite then to the ampulia where it is stored and used when needing movement
Astero?
Star
What is uniue about asteroidea?
Have external digestion
Ophiuro?
Snakes
What is unique about ophiuroidea?
Their arms move randomly
What is unique echinoidea?
Sea urchin
arms fuse together and ossices lengthen
Holo?
Complete
Thur?
Passage way
What is unique about holothuridea?
Sea Cucumber excretory system Short ossicles thick musscle wall Detrivore
Hemi?
Half
Why is hemichordates not accurate?
They thought htere was only a notochord in chordates and hemichordates have a buccle bone
What was a notochord?
Thick rod that keeps structure
Enteronusta?
Acorn shape
Covered in mucus to gather food when moving
Food partacles would get stuck in the collar where the mouth was
Entero?
Intestine
Pneusta?
breathing
Pterobranchii characteristic?
Filter feeder that lives in tube with feather up top
Ptero?
Wing
Branchii?
Branch
Where do hemichordates live?
tubes
What are the chordate traits?
Notorchord Pharengeal gill slits Endostyle Postanal tail Dorsal Hollow nerve chord
Cephalon?
head
Uro?
tail
What is it called from young to adult body?
Metamorphasis
What is it called with too early or late sexual development?
Paedeomorphisis