Homework from last class: <ul><li>Complete the Phylum Facebook project </li></ul><ul><li>Read Ch. 29-1 Echinodermata </li>...
Phylum Echinodermata: Echinoderms Chapter 29:Echinodermata pp. 637-644
BBC Life: Time Lapse of Sea Stars <ul><li>http://www.youtube.com/watch?v=HG17TsgV_qI </li></ul>
<ul><li>Phylum Echinodermata  </li></ul><ul><li>-  echino  = “spiny”,  dermis  = “skin” </li></ul><ul><li>Radial symmetry ...
<ul><li>Echinoderms appear to be  related to  chordates  (vertebrates). </li></ul><ul><li>Scientists think this because: <...
Classes of Echinoderms <ul><ul><li>1)  Class Asteroidea:  ex: star fish (aka sea stars) </li></ul></ul><ul><ul><li>Often  ...
Classes of Echinoderms <ul><ul><li>4)  Class Holothuroidea:  ex: sea cucumbers </li></ul></ul><ul><ul><li>Usually  detritu...
Form and Function of Echinoderms <ul><ul><ul><li>Representative member: sea star </li></ul></ul></ul><ul><ul><ul><li>Diges...
<ul><ul><ul><li>Respiratory system: </li></ul></ul></ul><ul><ul><ul><li>Tube feet for O 2 /CO 2  exchange </li></ul></ul><...
<ul><ul><ul><li>Nervous system: </li></ul></ul></ul><ul><ul><ul><li>Primitive </li></ul></ul></ul><ul><ul><ul><li>No head ...
<ul><ul><ul><li>Musculoskeletal system: </li></ul></ul></ul><ul><ul><ul><li>Instead of muscles, sea stars have a unique  w...
<ul><ul><ul><li>Reproductive system: </li></ul></ul></ul><ul><ul><ul><li>Usually separate sexes </li></ul></ul></ul><ul><u...
<ul><li>Sea stars  control many populations  (they are important predators) </li></ul><ul><li>Sea urchins often  control a...
Demo –  Sea Star Dissection
 
 
 
Homework for next class: <ul><li>Complete Echinoderms and Chordates Worksheet –  </li></ul><ul><li>1 st  side  only  (Sect...
Works Cited <ul><li>Images taken from the following sources: </li></ul><ul><li>http://faculty.clintoncc.suny.edu/faculty/m...
Works Cited <ul><li>Images taken from the following sources: </li></ul><ul><li>http://www.kadamsphoto.com/nature_recreatio...
Upcoming SlideShare
Loading in …5
×

Biol 11 Lesson 5 April 15 - Ch. 29 Echinodermata

1,353 views
1,062 views

Published on

0 Comments
1 Like
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total views
1,353
On SlideShare
0
From Embeds
0
Number of Embeds
28
Actions
Shares
0
Downloads
57
Comments
0
Likes
1
Embeds 0
No embeds

No notes for slide

Biol 11 Lesson 5 April 15 - Ch. 29 Echinodermata

  1. 1. Homework from last class: <ul><li>Complete the Phylum Facebook project </li></ul><ul><li>Read Ch. 29-1 Echinodermata </li></ul>
  2. 2. Phylum Echinodermata: Echinoderms Chapter 29:Echinodermata pp. 637-644
  3. 3. BBC Life: Time Lapse of Sea Stars <ul><li>http://www.youtube.com/watch?v=HG17TsgV_qI </li></ul>
  4. 4. <ul><li>Phylum Echinodermata </li></ul><ul><li>- echino = “spiny”, dermis = “skin” </li></ul><ul><li>Radial symmetry (often pentaradial) </li></ul><ul><ul><li>However, larvae have bilateral symmetry </li></ul></ul><ul><li>3 cell layers (ectoderm, endoderm, mesoderm) </li></ul><ul><li>Internal skeleton (endoskeleton) – plates of CaCO 3 </li></ul><ul><li>Water vascular system with tube feet </li></ul><ul><li>All marine </li></ul><ul><li>Very ancient group unlike those </li></ul><ul><li>of any other living group </li></ul>Introduction to Echinoderms
  5. 5. <ul><li>Echinoderms appear to be related to chordates (vertebrates). </li></ul><ul><li>Scientists think this because: </li></ul><ul><li>Echinoderm larvae are similar to certain chordate larvae. </li></ul><ul><li>Echinoderms have an endoskeleton (not exoskeleton). </li></ul><ul><li>Their pattern of embryonic development is same as for chordates ( radial cleavage – anus develops before mouth ) </li></ul><ul><ul><li>Mollusk, annelid, and arthropod embryos undergo spiral cleavage - mouth develops first. </li></ul></ul>
  6. 6. Classes of Echinoderms <ul><ul><li>1) Class Asteroidea: ex: star fish (aka sea stars) </li></ul></ul><ul><ul><li>Often pentaradial, usually predatory </li></ul></ul><ul><ul><li>Creep along using tube feet </li></ul></ul><ul><ul><li>2) Class Ophuroidea: ex: brittle stars </li></ul></ul><ul><ul><ul><li>Largest group </li></ul></ul></ul><ul><ul><ul><li>Often pentaradial </li></ul></ul></ul><ul><ul><ul><li>Filter feeders or detritus feeders </li></ul></ul></ul><ul><ul><ul><li>Flexible arms </li></ul></ul></ul><ul><ul><li>3) Class Echinoidea: ex: sea urchins, sand dollars </li></ul></ul><ul><ul><li>Some with protective spines </li></ul></ul><ul><ul><li>Usually grazers (eat algae) </li></ul></ul>
  7. 7. Classes of Echinoderms <ul><ul><li>4) Class Holothuroidea: ex: sea cucumbers </li></ul></ul><ul><ul><li>Usually detritus feeders (aka scavengers) </li></ul></ul><ul><ul><li>Radial symmetry </li></ul></ul><ul><ul><li>Often live in ‘herds’ on ocean floor </li></ul></ul><ul><ul><li>5) Class Crinoidea: ex: sea lilies and feather stars </li></ul></ul><ul><ul><li>Long, feathery arms </li></ul></ul><ul><ul><li>Sessile </li></ul></ul><ul><ul><li>Filter feeders </li></ul></ul><ul><ul><li>Rare today but lots of fossils of them </li></ul></ul>
  8. 8. Form and Function of Echinoderms <ul><ul><ul><li>Representative member: sea star </li></ul></ul></ul><ul><ul><ul><li>Digestive system: </li></ul></ul></ul><ul><ul><ul><li>Starfish pry open prey (ex: bivalves) with their tube feet, then flip stomach inside out into the prey and secrete enzymes to digest the tissue. Then they suck their stomach back in. </li></ul></ul></ul><ul><ul><ul><li> oral surface (location of mouth)  is on bottom </li></ul></ul></ul><ul><ul><ul><li> aboral surface (location of anus)  is on top </li></ul></ul></ul><ul><ul><ul><li>Scavengers (ex: sea cucumbers) </li></ul></ul></ul><ul><ul><ul><li>Filter feeders (ex. sea lillies) </li></ul></ul></ul>
  9. 9. <ul><ul><ul><li>Respiratory system: </li></ul></ul></ul><ul><ul><ul><li>Tube feet for O 2 /CO 2 exchange </li></ul></ul></ul><ul><ul><ul><li>Some species have “skin gills” </li></ul></ul></ul><ul><ul><ul><li>Circulatory and Excretory systems: </li></ul></ul></ul><ul><ul><ul><li>No separate systems for these (tube feet and skin gills are all over the body and take care of O 2 /CO 2 exchange and metabolic waste removal </li></ul></ul></ul><ul><ul><ul><ul><li>Nutrients (food) are distributed by digestive glands , not by blood (there is no blood ) </li></ul></ul></ul></ul>Sea star tube feet Adult sea star internal anatomy
  10. 10. <ul><ul><ul><li>Nervous system: </li></ul></ul></ul><ul><ul><ul><li>Primitive </li></ul></ul></ul><ul><ul><ul><li>No head </li></ul></ul></ul><ul><ul><ul><li>Nerve ring surrounds mouth; radial nerves in arms </li></ul></ul></ul><ul><ul><ul><li>Sea stars have eyespots at tip of each arm </li></ul></ul></ul><ul><ul><ul><li>Statocysts (to tell which side is up) </li></ul></ul></ul>
  11. 11. <ul><ul><ul><li>Musculoskeletal system: </li></ul></ul></ul><ul><ul><ul><li>Instead of muscles, sea stars have a unique water vascular system (hydraulics) </li></ul></ul></ul><ul><ul><ul><li>Water vascular system consists of: </li></ul></ul></ul><ul><ul><ul><li>ring canal: forms a circle around digestive system </li></ul></ul></ul><ul><ul><ul><li>radial canals: canals which extend into each arm </li></ul></ul></ul><ul><ul><ul><li>tube feet: suction-cuplike structures connected to the water vascular system </li></ul></ul></ul><ul><ul><ul><li>madreporite (sieve plate): opening used to filter water into the water vascular system </li></ul></ul></ul><ul><ul><ul><li>(see p. 639) </li></ul></ul></ul><ul><ul><ul><li>Sea star endoskeleton is composed of protective plates made of CaCO 3 (for protection , not involved in movement). </li></ul></ul></ul><ul><ul><ul><li>Some echinoderms can walk around on their arms (ex: brittle stars) or crawl (ex. sea cucumbers) </li></ul></ul></ul>
  12. 12. <ul><ul><ul><li>Reproductive system: </li></ul></ul></ul><ul><ul><ul><li>Usually separate sexes </li></ul></ul></ul><ul><ul><ul><li>“ Broadcast method” - sexual reproduction </li></ul></ul></ul><ul><ul><ul><li>Regeneration – asexual reproduction </li></ul></ul></ul><ul><ul><ul><ul><li>Many species can regrow lost parts </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Sea Star Renegeration </li></ul></ul></ul></ul><ul><ul><ul><ul><li>http://www.youtube.com/watch?v=f7cXeWxxfD4 </li></ul></ul></ul></ul>
  13. 13. <ul><li>Sea stars control many populations (they are important predators) </li></ul><ul><li>Sea urchins often control algae populations </li></ul><ul><ul><li>Both sea stars and sea urchins have been known to upset the ecology of an area </li></ul></ul><ul><ul><li>Sea urchins are used in embryological research (large eggs) </li></ul></ul><ul><ul><li>Drug research (ex. anti-viral and anti-cancer drugs) </li></ul></ul><ul><ul><li>Some are edible delicacie s (ex. sea urchin eggs and sea cucumbers) </li></ul></ul>Ecology of Echinoderms
  14. 14. Demo – Sea Star Dissection
  15. 18. Homework for next class: <ul><li>Complete Echinoderms and Chordates Worksheet – </li></ul><ul><li>1 st side only (Section 29-1) </li></ul><ul><li>Complete sea star colouring diagram (include a key) </li></ul><ul><li>Work on 15 Ch. 29 Echinodermata cue cards </li></ul><ul><ul><li>Due Thursday, April 21 (Ch. 26-29 Invertebrate Test day) </li></ul></ul>Have a great weekend!
  16. 19. Works Cited <ul><li>Images taken from the following sources: </li></ul><ul><li>http://faculty.clintoncc.suny.edu/faculty/michael.gregory/files/bio%20102/bio%20102%20lectures/animal%20diversity/protostomes/lophotrochozoans/lophotrochozoans.htm </li></ul><ul><li>http://myfishtanks.info/fish-profile/saltwater-invertebrate-profiles/brittle-star-tiger-striped-serpent-seastar/ </li></ul><ul><li>http://www.iloverubberstamps.com/catalogpage2.html </li></ul><ul><li>http://clipart.usscouts.org/library/us_fish_and_wildlife_service/fish/ </li></ul><ul><li>http://jklsciencelab.weebly.com/starfish-dissection.html </li></ul><ul><li>http://www.topnews.in/law/general/featured?page=5816&destination=taxonomy </li></ul><ul><li>http://www.easyvectors.com/browse/other/sea-cucumber-clip-art </li></ul><ul><li>http://etc.usf.edu/clipart/49800/49826/49826_sea_lily.htm </li></ul><ul><li>http://www.australiascoralcoast.com/en/Things_to_see_and_do/Nature_and_wildlife/Pages/Nature_and_wildlife.aspx </li></ul><ul><li>http://www.picassomio.es/crown-of-thorns-starfish-poster-2386298.html </li></ul><ul><li>http://en.wikipedia.org/wiki/File:Sea_urchin_tests.jpg </li></ul>
  17. 20. Works Cited <ul><li>Images taken from the following sources: </li></ul><ul><li>http://www.kadamsphoto.com/nature_recreation/seashells_mollusks.htm </li></ul><ul><li>http://www.interesting-facts.biz/category/marine-animals-facts/page/3 </li></ul><ul><li>http://megashare.info/watch-the-office-season-7-episode-14-online-TWpVM01nPT0 </li></ul><ul><li>http://aspire.mlml.calstate.edu/aspire04/updates/nov/25nov/nov25.htm </li></ul><ul><li>http://siera104.com/bio/echin.html </li></ul><ul><li>http://www.naturebridge.org/headlands/blog/rachel-loud/creature-month-sea-stars </li></ul><ul><li>http://bonneeats.com/?p=270 </li></ul><ul><li>http://www.mahingakai.org.nz/mahinga-kai-species/kina </li></ul>

×