Warm Up What characteristics do insects share?. Chapter 10 Section 5.

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Presentation transcript:

Warm Up What characteristics do insects share?

Chapter 10 Section 5

Discover Activity How do sea stars hold on? Page 358

Objectives: To list the main characteristics of echinoderms. To name he major groups of echinoderms.

Echinoderms: The "Spiny-skinned" Animals Echinoderms include starfish sea cucumbers sea urchins sand 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.

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.

Iconocaster longimanus

Sea star on intertidal flat

Basket Star Feather Starfish

Starfish (with yellow polyps)

y/echinoderms/urchin01 Green Stripped Serpent Star

Blue Linkia Star Fish

cushion star

Brittle Stars Similar in appearance to star fish, but do not have suction cups on their tube feet. Their arms are long and slender with flexible joints.

ery/echinoderms/urchin 01 Brittle Star

Dwarf Brittle Star

Sea Cucumbers Resemble a warty cucumber Head on one end and an anus at the other Move along the ocean bottom by using the five rows of tube feet on their body surface to wiggle back and forth

Blotched sea Cucumber

Sea Cucumber

Slipper Sea Cucumber

Sea Urchins and Sand Dollars Both are round shaped and rayless Sand dollars are flat Sea urchins are dome shaped Have long spines that are used for protection Some have poisonous sacs found at the tip of each spine that can deliver painful stings

oderms/urchin01 Purple-spined Sea Urchin

Purple Sea Urchin Rock-boring Urchin

Pencil sea urchin

SAND DOLLAR -- Live Dendraster excentricus

Tiny Florida Sand Dollar Sea Shell Biscuits Sea Shell Cookies

Homework Guided Reading and Study Workbook pages