Transcript Ocean Bugs

Ocean Bugs
Christie Mahaffey
GK-12 Sensors!
How and why classify?
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Kings
Play
Chess
On
Fat
Green
Stools
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Kingdom
Phylum
Class
Order
Family
Genus
Species
What is an invertebrate?
Echinoderms
• “Spiny-skinned”
• 6,000 species
(marine)
• No heart
• No brain
• No eyes*
Sea stars and Brittle stars
Stomach
Microscopic view of
brittle star
movement
Look at tube feet
Video from
www.RaceRocks.com
QuickTime™ and a
Sorenson Video 3 decompressor
are needed to see this picture.
So, which senses do they have?
Sea stars
• Touch
• Respond to light
• Chemosensors
• Tube feet
From Physics Today online
What in the world is a
chemosensor?
www.Racerocks.com