Transcript Echinoderms

ECHINODERMS
MEGAN SNYDER AND ANITA SOEMER
http://www.bing.com/images/search?q=starfish+labeled&qs=IM&form=QBIRMH&pq=starfish+label&sc
=814&sp=1&sk=#view=detail&id=47996ECADFA4F713FD24356D6F1E7EA504247D96&selectedIndex=
0
WHAT TYPE OF SYMMETRY?
ALL IMAGES: GOOGLE.COM/IMAGES
RADIAL
HOW DO THEY MOVE?
• TUBE FEET
• EACH ARM HAS HUNDREDS OF TUBES
• SUCKERS TO NAVIGATE
• WATER VASCULAR SYSTEM
SYSTEMS
WATER VASCULAR SYSTEM?
• LOCOMOTION
• FOOD & WASTE TRANSPORTATION
• RESPIRATION
NERVOUS SYSTEM
• PRESENT IN ENTIRE BODY
• SENSORY CELLS GATHER INFORMATION ABOUT
SURROUNDINGS
• NERVE RING HELPS COORDINATE MOVEMENT
• EYE SPOTS DETECT LIGHT
DIGESTIVE SYSTEM
• ONE-WAY (ANUS AND MOUTH)
• PUSH STOMACH OUTSIDE BODY
• EAT DECOMPOSING ANIMAL OR PLANT
• DIGEST EXTERNALLY
EXCRETORY SYSTEM
• PRESENT
• OSMOSIS/DIFFUSION
• RID BODIES OF NITROGENOUS
WASTE
• WATER VASCULAR SYSTEM
• NO KIDNEYS
CIRCULATORY SYSTEM
• OPEN/OSMOSIS/DIFFUSION
• NO TRUE HEART
• WATER PUMPED THROUGH BODY
• CILIA CIRCULATES FLUIDS
• FLUID-FILLED CANALS FOR GAS EXCHANGE
RESPIRATORY SYSTEM
• DIFFUSION/OSMOSIS
• GILLS, CUTANEOUS, LUNGS
• TAKE IN OXYGEN & PASS OUT CO2
• WATER VASCULAR SYSTEM
SUPPORT OR SKELETAL SYSTEM
• ABSENT
• ENDOSKELETON
• COVERED BY EPIDERMIS
• OSSICLES FIT CLOSE AND LOOSE
REPRODUCTIVE SYSTEM
• SEXUAL MORE COMMON
• TWO-THREE YEARS
• RELEASE EGG/SPERM INTO WATER
• FEMALE CAN RELEASE 100 MILLION EGGS
• CAN REGROW
ASTEROIDEA
• SEA STARS
• 5-40 ARMS
• CENTRAL DISK
• CIRCULAR TO PENTAGONAL
• TUBE FEET AS SENSORY RECEPTORS
OPHIUROIDEA
• BRITTLE STARS, BASKET STARS, SNAKE STARS
• 5-10 ARMS
• RARELY MORE THAN 5
• ARMS LENGTH SEVERAL TIMES DISK DIAMETER
• DISK DIAMETER FROM 3MM TO 150MM
ECHINOIDEA
• SEA URCHINS, HEART URCHINS, SAND DOLLARS
• LACKING ARMS
• HAVE A SPINY SHELL
• TEST MADE FROM FUSED SKELETAL PLATES
CRINOIDEA
• SEA LILIES, FEATHER STARS
• STALKED, DETRITUS-FEEDING, AND SESSILE
• AT LEAST 10 ARMS
• SEA LILIES UP TO 40 ARMS
• FEATHER STARS UP TO 200 ARMS
HOLOTHUROIDEA
• SEA CUCUMBERS
• LIE ON SIDES
• SKELETON REDUCED TO OSSICLES EMBEDDED IN SKIN
• NO ARMS, TUBE FEET AROUND MOUTH
• FORM CIRCLE OF 10-30 TENTACLES
“SPINY SKINNED”?
• LITERAL SPINY SKIN
• MADE FROM CALCIUM CARBONATE
• FOR PROTECTION
• CAN CONTAIN POISON
WHERE DO THEY LIVE?
• MARINE ENVIRONMENTS
• SALT WATER
• OCEANS
• SHALLOW TIDE POOLS
MADREPORITE
• SIEVE-LIKE PLATE IN SOME ECHINODERMS
• HOW WATER PASSES INTO VASCULAR SYSTEM
1. STOMACH
http://www.bing.com/images/search?q=starfish+stomach&qs=n&form=QBIR&pq=starfish+stomach&sc=
6-16&sp=1&sk=#view=detail&id=0AA83808D454A326E782412CB2B4AF136D7504ED&selectedIndex=3
2. SPINE
http://www.bing.com/images/search?q=starfish+spine&qs=n&form=QBIR&pq=starfish+spine&sc=811&sp=1&sk=#view=detail&id=E777C25E1282F5CB22FF90AF917CF1A918455EB6&selectedIndex=6
3. GILLS
http://www.bing.com/images/search?q=starfish+gills&qs=n&form=QBIR&pq=starfish+gills&sc=811&sp=1&sk=#view=detail&id=EE256098E00D16A9DB50C9EF4726C03598FA4C61&selectedIndex=0
4. MADREPORITE
http://www.bing.com/images/search?q=starfish+madreporite&qs=AS&sk=&FORM=QBIR&pq=starfish
%20madre&sc=814&sp=1&qs=AS&sk=#view=detail&id=7A432ED4EB09743A6481B94FDCB0D98AC77A88C0&select
edIndex=2
5. GONADS
http://www.bing.com/images/search?q=starfish+gonads&qs=n&form=QBIR&pq=starfish+gonads&sc=3
-15&sp=1&sk=#view=detail&id=327D8D3B2F6402F4510D00B158AB985119AC17B9&selectedIndex=16
6. RING CANAL
http://www.bing.com/images/search?q=starfish+ring+canal&qs=n&form=QBIR&pq=starfish+ring+cana
l&sc=2-18&sp=1&sk=#view=detail&id=3B627EF5F5692E076621EB150DFA1C6B3AA8906F&selectedIndex=28
7. RADIAL NERVE
http://www.bing.com/images/search?q=starfish+radial+nerve&qs=n&form=QBIR&pq=starfish+radial+
nerve&sc=0-16&sp=1&sk=#view=detail&id=66722A0A60C2B74D9CD2009B7E0EDD0C2EAC6E29&selectedIndex=3
8. TUBE FEET
http://www.bing.com/images/search?q=starfish+tube+feet&qs=n&form=QBIR&pq=starfish+tube+feet
&sc=4-16&sp=1&sk=#view=detail&id=4EC511AED357393369A3BFF612F19E5166BFF6C2&selectedIndex=6
9. AMPULLA
http://www.bing.com/images/search?q=starfish+ampulla&qs=n&form=QBIR&pq=starfish+ampulla&sc=
4-15&sp=1&sk=#view=detail&id=5CE6CAFCD3DD0F2A2A532C0235784C34F74CD237&selectedIndex=11
10. RADIAL CANAL
http://www.bing.com/images/search?q=starfish+radial+canal&qs=n&form=QBIR&pq=starfish+radial+
canal&sc=2-20&sp=1&sk=#view=detail&id=EE256098E00D16A9DB50F712A0DACEFC622E5E2F&selectedIndex=2
11. DIGESTIVE GLANDS
http://www.bing.com/images/search?q=starfish+digestive+glands&qs=n&form=QBIR&pq=starfish+dig
estive+glands&sc=2-21&sp=1&sk=#view=detail&id=9E9065F2F615879D7A529BA0C72438AC1491D244&selectedIndex=0
12. ANUS
http://www.bing.com/images/search?q=starfish+anus&qs=n&form=QBIR&pq=starfish+anus&sc=113&sp=1&sk=#view=detail&id=9E9065F2F615879D7A52B5EDBDD664EFCC5C6C40&selectedIndex=48
13. CENTRAL DISK
http://www.bing.com/images/search?q=starfish+without+arms&qs=n&form=
QBIR&pq=starfish+without+arms&sc=2-17&sp=1&sk=#view=detail&id=0A01B20EB43DA980636CCBE738472A8FB3CA7254&sel
ectedIndex=15