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Warm UpWhat characteristics do insects share?
Chapter 10Section 5
Discover ActivityHow do sea stars hold on? Page 358
Objectives:To list the main characteristics of
echinoderms.To name he major groups of echinoderms.
http://www.seinan-gu.ac.jp/~djohnson/natural/fauechinoderms.html
Echinoderms: The "Spiny-skinned" Animals Echinoderms include
starfish sea cucumbers sea urchinssand dollars
The water vascular system is a system of fluid-filled internal tubes that carry food and oxygen, remove wastes, and help echinoderms move.
All echinoderms use their tube feet to "walk". Some use them to get food.
Echinoderms have an endoskeleton made of hardened plates.
Adults have radial symmetry, usually in multiples of 5.
They reproduce sexually. The fertilized eggs develop into larva which undergo a metamorphosis to become adults.
http://www.belowsealevel1.com/echinoderms_03.htm
Star Fish
Starfish
Starfish have five or more arms (or rays) that extend from a central body.
Starfish have the ability to regenerate.They use their tube feet to capture prey and
to move.
http://stjohntour.com/Sealife/echinoderms.htm
http://sg.homeunix.com/hantu/echinoderms
Iconocaster longimanus
http://sg.homeunix.com/hantu/echinoderms
Sea star on intertidal flat
Basket Star
http://www.seasky.org/reeflife/sea2d1.html
Feather Starfish
http://www.pirx.com/gallery/echinoderms/urchin01
Starfish (with yellow polyps)
http://www.pirx.com/gallery/echinoderms/urchin01
Green Stripped Serpent Star
Blue Linkia Star Fish
http://www.belowsealevel1.com/echinoderms_07.htm
http://sg.homeunix.com/hantu/echinoderms
cushion star
Brittle StarsSimilar in appearance to star fish, but do not
have suction cups on their tube feet. Their arms are long and slender with flexible
joints.
http://www.pirx.com/gallery/echinoderms/urchin01
Brittle Star
http://www.pirx.com/gallery/echinoderms/urchin01
Dwarf Brittle Star
Sea CucumbersResemble a warty cucumberHead on one end and an anus at the otherMove along the ocean bottom by using the
five rows of tube feet on their body surface to wiggle back and forth
http://sg.homeunix.com/hantu/echinoderms
Blotched sea Cucumber
http://www.belowsealevel1.com/echinoderms_03.htm
Sea Cucumber
Slipper Sea Cucumber
http://www.seasky.org/reeflife/sea2d1.html
Sea Urchins and Sand DollarsBoth are round shaped and raylessSand dollars are flatSea urchins are dome shaped
Have long spines that are used for protectionSome have poisonous sacs found at the tip of
each spine that can deliver painful stings
http://www.pirx.com/gallery/echinoderms/urchin01
Purple-spined Sea Urchin
http://www.seasky.org/reeflife/sea2d1.html
Purple Sea Urchin
Rock-boring Urchin
Pencil sea urchin
http://www.seashells.org/identcatagories/seaurchins.htm
SAND DOLLAR -- Live
Dendraster excentricus
http://www.mbayaq.org/efc/living_species/print.asp?inhab=143
Tiny Florida Sand Dollar
Sea Shell Biscuits
Sea Shell Cookies
http://www.seashellworld.com/seashells/Sand.html
HomeworkGuided Reading and Study Workbook pages
149-151
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