True or False
True of False: crinoids are also known are sea lilies
true
What language does Echinodermata stem from?
Greek
Why do echinoderms use their tube feet for gas exchange?
Because they don't have lungs or gills
1. Sexually
2. Asexually
3. Both
3. Both
Sea stars can live up to _____ _____
20 years
True of False: the purpose of tube feet are only for locomotion
False: they have many other purposes such as to aid with gas exchange
How many germ layers do echinoderms have
Three
What 2 systems does the internal transport of echinoderms have?
water vascular system and the hemal system
What are some characterisitcs of echinoderms?
1. Have lungs
2. Have an endoskeleton
3. Have fish gills
4. Can live in freshwater environments
5. Radical symmetry
2. Have an endoskeleton and 5. Radical symmetry
______ ______ is to have an arrangement around a central point, where the pattern is consistent and repeats.
Radical symmetry
True or false: sea stars digest externally
True
Tube feet are mainly used for what?
Locomotion
What is the outering of an echinoderm supported by?
An internal skeleton
The mesoderm forms the:
1. skeleton, reproductive organs, and muscles
2. the nervous syste, and skin
3. digestive tract and associated organs
1. skeleton, reproductive organs, and muscles
sea stars are classified as echinoderms because they have radical symmetry, as their legs join at a ______ ______
Central Point
True or False: echinoderms can be found not only in oceans
False: organisms in this phylum can only be found in oceans
What do the sea star larvae undergo before entering its juvenile stage?
Metamorposis
What is the order of the sea star life cycle?
sperm and eggs released, eggs ferralized, turn into larvae, juvenile stage, adult
Sea urchins are classified as part of the echinodermata phylum because they have:
1. Tube feet
2. Radical Arrangement
3. Spiny outering
4. Water vascular system
1. Tube feet
2. Radical Arrangement
3. Spiny outering
4. Water vascular system
Echinoderms use the ______ ______ _____ to move oxygen nutrients and waste the fluid moves through the canals in the body.
water vascular system
True or False: "Star fish" is the correct term for the stars of the ocean
False: Sea star is actually the correct term because sea stars are not fish.
______ also have a water vascular system, along with an endoskeleton and radical symmetry and tube feet at what looks like the stem.
Crinoids
What is the sea urchin's ecological role mentioned?
they graze on algae which keeps the growth of algae in a good spot for the coral reefs so they can grow which prevents the algae to overgrow the coral ecosystems
Gas exchange happens through:
1. Water vascular system
2. Diffusion
3. Gills
4. Lungs
2. Diffusion
Echinoderms are _________, which means they have three germ layers
Triploblastic