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ECHINODERMS

ECHINODERMS. ECHINODERMS. Means spiny skin. ECHINODERMS. Means spiny skin include sea stars, sea cucumbers, sea urchins and sand dollars. SEA CUCUMBER. SAND DOLLAR. SEA URCHIN. SEA URCHIN. http://www.racerocks.com/racerock/archives/vidpurpleurchin2a.htm. ECHINODERMS. Means spiny skin

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ECHINODERMS

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  1. ECHINODERMS

  2. ECHINODERMS • Means spiny skin

  3. ECHINODERMS • Means spiny skin • include sea stars, sea cucumbers, sea urchins and sand dollars

  4. SEA CUCUMBER

  5. SAND DOLLAR

  6. SEA URCHIN

  7. SEA URCHIN • http://www.racerocks.com/racerock/archives/vidpurpleurchin2a.htm

  8. ECHINODERMS • Means spiny skin • include sea stars, sea cucumbers, sea urchins and sand dollars • ENDOSKELETON-internal skeleton • made of spines

  9. ECHINODERMS • Means spiny skin • include sea stars, sea cucumbers, sea urchins and sand dollars • ENDOSKELETON-internal skeleton • made of spines • spines made of calcium carbonate

  10. ECHINODERMS • Means spiny skin • include sea stars, sea cucumbers, sea urchins and sand dollars • ENDOSKELETON-internal skeleton • made of spines • spines made of calcium carbonate • covered in thin layer of skin

  11. ECHINODERMS • Means spiny skin • include sea stars, sea cucumbers, sea urchins and sand dollars • ENDOSKELETON-internal skeleton • made of spines • spines made of calcium carbonate • covered in thin layer of skin

  12. ECHINODERMS • Usually have 5 arms around a central disk

  13. ECHINODERMS • Usually have 5 arms around a central disk • RADIALLY symmetrical-radiate around a central point (like spokes of a tire)

  14. ECHINODERMS • Usually have 5 arms around a central disk • RADIALLY symmetrical-radiate around a central point (like spokes of a tire) • live only in the ocean

  15. ECHINODERMS • Usually have 5 arms around a central disk • RADIALLY symmetrical-radiate around a central point (like spokes of a tire) • live only in the ocean • no well defined head

  16. ECHINODERMS • Usually have 5 arms around a central disk • RADIALLY symmetrical-radiate around a central point (like spokes of a tire) • live only in the ocean • no well defined head • circulatory, respiratory and excretory systems missing

  17. ECHINODERMS • Have a nervous system, but no brain

  18. SEA STARS • Common name=star fish

  19. SEA STARS • Common name=star fish • range from 1cm to 1 m in diameter

  20. SEA STARS • Common name=star fish • range from 1cm to 1 m in diameter • made of central disk and 5 tapered RAYS (arms)

  21. SEA STARS • Common name=star fish • range from 1cm to 1 m in diameter • made of central disk and 5 tapered RAYS (arms) • CENTRAL DISK-area of mouth and stomach

  22. SEA STARS • Common name=star fish • range from 1cm to 1 m in diameter • made of central disk and 5 tapered RAYS (arms) • CENTRAL DISK-area of mouth and stomach • NERVE RING-surrounds mouth

  23. SEA STARS • Nervous system=nerve ring and nerves radiating out from ring

  24. SEA STARS • Nervous system=nerve ring and nerves radiating out from ring • WATER VASCULAR SYSTEM-used for movement and getting food

  25. SEA STARS • Nervous system=nerve ring and nerves radiating out from ring • WATER VASCULAR SYSTEM-used for movement and getting food • SIEVE PLATE-water enters

  26. SEA STARS • Nervous system=nerve ring and nerves radiating out from ring • WATER VASCULAR SYSTEM-used for movement and getting food • SIEVE PLATE-water enters • STONE CANAL-tube leading from sieve plate

  27. SEA STARS • Nervous system=nerve ring and nerves radiating out from ring • WATER VASCULAR SYSTEM-used for movement and getting food • SIEVE PLATE-water enters • STONE CANAL-tube leading from sieve plate • Ring canal-surrounds central disk • RADIAL CANALS-extend down each ray from stone canal • AMPULLA-forms suction

  28. SEA STAR • TUBE FEET-connected to radial canal

  29. SEA STAR • TUBE FEET-connected to radial canal • hollow cylinders that act as suction disks

  30. SEA STAR • TUBE FEET-connected to radial canal • hollow cylinders that act as suction disks • help in movement

  31. SEA STAR • TUBE FEET-connected to radial canal • hollow cylinders that act as suction disks • help in movement • Sea stars eat mollusks

  32. SEA STAR • TUBE FEET-connected to radial canal • hollow cylinders that act as suction disks • help in movement • Sea stars eat mollusks • pry open shells

  33. SEA STAR • TUBE FEET-connected to radial canal • hollow cylinders that act as suction disks • help in movement • Sea stars eat mollusks • pry open shells • turns stomach inside out through its mouth

  34. SEA STAR • TUBE FEET-connected to radial canal • hollow cylinders that act as suction disks • help in movement • Sea stars eat mollusks • pry open shells • turns stomach inside out through its mouth • inserts stomach into shell, starts digestion right away

  35. SEA STARS • REGENERATION-ability to regrow lost parts (ex. Arms)-central disk has to remain • SKIN GILLS-gas exchange (in addition to tube feet)

  36. SEA STAR FEEDING

  37. SEA STAR CLEANING STOMACH

  38. OTHER ECHINODERMS • SEA CUCUMBER-shaped like cucumber

  39. OTHER ECHINODERMS • SEA CUCUMBER-shaped like cucumber • mouth on one end, tentacles all around

  40. OTHER ECHINODERMS • SEA CUCUMBER-shaped like cucumber • mouth on one end, tentacles all around • anus on other end

  41. OTHER ECHINODERMS • SEA CUCUMBER-shaped like cucumber • mouth on one end, tentacles all around • anus on other end • ejects internal organs when attacked

  42. OTHER ECHINODERMS • SEA CUCUMBER-shaped like cucumber • mouth on one end, tentacles all around • anus on other end • ejects internal organs when attacked • regenerates lost parts

  43. OTHER ECHINODERMS • SEA URCHINS-large spines, look like prickly burr

  44. OTHER ECHINODERMS • SEA URCHINS-large spines, look like prickly burr • use spines to move

  45. OTHER ECHINODERMS • SEA URCHINS-large spines, look like prickly burr • use spines to move • SAND DOLLARS-flat and smooth-small spines

  46. IMPORTANCE OF MOLLUSKS/ECHINODERMS • Food

  47. IMPORTANCE OF MOLLUSKS/ECHINODERMS • Food • used at one time as money (clams)

  48. IMPORTANCE OF MOLLUSKS/ECHINODERMS • Food • used at one time as money (clams) • shells are sold

  49. IMPORTANCE OF MOLLUSKS/ECHINODERMS • Food • used at one time as money (clams) • shells are sold • make jewelry etc.

  50. IMPORTANCE OF MOLLUSKS/ECHINODERMS • Food • used at one time as money (clams) • shells are sold • make jewelry etc. • pearls

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