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Echinoderms

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by

Lily B

on 6 April 2016

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Transcript of Echinoderms

Echinoderms
Echinoderms are invertebrates with an internal skeleton and a system of fluid-filled tubes called a water vascular system.
Body Structure
- have an endoskeleton
-skin is stretched over the endoskeleton
-made of plates, gives animal a bumpy texture
-radial symmetry, usually multiples of five
Movement
They use their tube feet to move. Tube feet act like small, sticky suction cups.
Move slowly.
Obtaining Food
-use their tube feet to capture food
-move along slowly while catching food
- most are carnivores, but some are omnivores
-some eat algae and others eat shellfish
Stable Conditions
Habitat
-they live in salt water
-can't survive in fresh water
-some prefer rocky others while others like sandy areas so they can bury themselves
Echinoderms
Reproduction
-Almost all Echinoderms are male or female
-Reproduce sexually and asexually
-The female releases her egg and the male releases his sperm
-The sperm fertilizes the egg
-The fertilized eggs develop into swimming larvae
-The larvae eventually undergo metamorphosis and become adult echinoderms
-maintain stable conditions by homeostasis
-adapt to match the color of their surroundings
-all cold blooded, so they move where the sun is
Strongylocentrotus
Purpuratus
(Purple Sea Urchin)
- They are considered
delecacies in Japan.
- Spawn in the winter
or early spring.
- Most of the time
they are stationary.
Ophiuroidea
(Brittle Starfish)
- Bury themselves
for protection.
- Their arms come
off but grow back.
- They are usually
found in large
numbers.
Encope Michelini
(Arrowhead sand dollar)
- found in shallow
parts of the ocean.
- live for 6-10 years.
- sand dollars are
flattened sea urchins.
Sources
-http://www.arkive.org/purple-sea-urchin/strongylocentrotus-purpuratus/
-http://www.montereybayaquarium.org/animal-guide/invertebrates/spiny-brittle-star
-http://wiki.hicksvilleschools.org/groups/hsbiology/wiki/8168e/Arrowhead_Sand_Dollar.html
-
-http://www.darwinsgalapagos.com/animals/echinodermata_echinoderms.htm
-http://www.aboutfishonline.com/articles/brittle-stars.html
-http://www.gwinnett.k12.ga.us/CooperES/Teacher_Websites/Watson_Web/5th_marine_biology_thursday/anniepurpleseaurchin.html
-http://www.shells-of-aquarius.com/sand_dollars.html
-http://www.seashells.org/sanddollars.html
-http://echinodermsg.blogspot.com/2007/04/habitat-and-adaptations.html
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