mollusks and annelids
DESCRIPTION
Mollusks and Annelids. BIOL 1407. Phylum Mollusca. Chitons Gastropods – snails, slugs Bivalves – clams, oysters, scallops Cephalopods – chambered nautilus, squid, cuttlefish, octopus. Chitons. Gastropods. Video: Click on “Mating Leopard Slugs” - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Mollusks and Annelids](https://reader036.vdocuments.net/reader036/viewer/2022062520/5681634f550346895dd3ee58/html5/thumbnails/1.jpg)
Mollusks and Annelids
BIOL 1407
![Page 2: Mollusks and Annelids](https://reader036.vdocuments.net/reader036/viewer/2022062520/5681634f550346895dd3ee58/html5/thumbnails/2.jpg)
![Page 3: Mollusks and Annelids](https://reader036.vdocuments.net/reader036/viewer/2022062520/5681634f550346895dd3ee58/html5/thumbnails/3.jpg)
Phylum Mollusca
• Chitons• Gastropods – snails, slugs• Bivalves – clams, oysters, scallops• Cephalopods – chambered nautilus, squid,
cuttlefish, octopus
![Page 4: Mollusks and Annelids](https://reader036.vdocuments.net/reader036/viewer/2022062520/5681634f550346895dd3ee58/html5/thumbnails/4.jpg)
Chitons
![Page 5: Mollusks and Annelids](https://reader036.vdocuments.net/reader036/viewer/2022062520/5681634f550346895dd3ee58/html5/thumbnails/5.jpg)
Gastropods
Photo Credit for Slug: Dr. Stephen Bostic, 2008
Video: Click on “Mating Leopard Slugs”http://www.bbc.co.uk/sn/tvradio/programmes/lifeintheundergrowth/video.shtml
![Page 6: Mollusks and Annelids](https://reader036.vdocuments.net/reader036/viewer/2022062520/5681634f550346895dd3ee58/html5/thumbnails/6.jpg)
Gastropods
Photo Credit for Florida Fighting Conch: LA Dawson, 2006, Wikimedia Commons
![Page 7: Mollusks and Annelids](https://reader036.vdocuments.net/reader036/viewer/2022062520/5681634f550346895dd3ee58/html5/thumbnails/7.jpg)
Bivalves
Photo Credit for Giant Clam: Jan Derk, 2002, Wikimedia Commons
![Page 8: Mollusks and Annelids](https://reader036.vdocuments.net/reader036/viewer/2022062520/5681634f550346895dd3ee58/html5/thumbnails/8.jpg)
Cephalopods
Video with Octopus and Cuttlefish: Start at 1:20 minutes http://www.youtube.com/watch?v=zC0zOLqYnRg&feature=related
Chambered Nautilus Photo Credit for Octopus: Albert Kok, 2007, Wikimedia Commons
![Page 9: Mollusks and Annelids](https://reader036.vdocuments.net/reader036/viewer/2022062520/5681634f550346895dd3ee58/html5/thumbnails/9.jpg)
Cephalopods
Photo Credit for Flamboyant Cuttlefish: Jenny Huang, 2006, FlickrPhoto Credit for Caribbean Reef Squids: Clark Anderson, 2006, Wikimedia Commons
![Page 10: Mollusks and Annelids](https://reader036.vdocuments.net/reader036/viewer/2022062520/5681634f550346895dd3ee58/html5/thumbnails/10.jpg)
Characteristics of Mollusks
• Bilateral symmetry• Triploblastic• Coelomate• Trochophore larva• Photo Credit for Lined Chiton: Kirt L. Onthank,
2007, Wikimedia Commons
![Page 11: Mollusks and Annelids](https://reader036.vdocuments.net/reader036/viewer/2022062520/5681634f550346895dd3ee58/html5/thumbnails/11.jpg)
Characteristics of Mollusks
• Shells (exoskeleton)
• Mantle• Visceral Mass• Foot• Photo Credit for Common Snail:
Macrophile, 2005, Wikimedia Commons
![Page 12: Mollusks and Annelids](https://reader036.vdocuments.net/reader036/viewer/2022062520/5681634f550346895dd3ee58/html5/thumbnails/12.jpg)
![Page 13: Mollusks and Annelids](https://reader036.vdocuments.net/reader036/viewer/2022062520/5681634f550346895dd3ee58/html5/thumbnails/13.jpg)
Characteristics of Mollusks
• Radula (many)• Video:
http://www.youtube.com/watch?v=BMOSvz5mThM&NR=1
• Video: http://www.teara.govt.nz/EarthSeaAndSky/SeaLife/Shellfish/2/ENZ-Resources/Standard/2/en
• Photo Credit for Gray Garden Slug Radula, TM400x: Michal Maňas, 2005, Wikimedia Commons
![Page 14: Mollusks and Annelids](https://reader036.vdocuments.net/reader036/viewer/2022062520/5681634f550346895dd3ee58/html5/thumbnails/14.jpg)
Characteristics of Mollusks
• Complete Digestive System
• Circulatory System: open or closed
• Gills• Centralized nervous
system• Photo Credit for Nudibranch: Jans Petersen,
2006, Wikimedia Commons
![Page 15: Mollusks and Annelids](https://reader036.vdocuments.net/reader036/viewer/2022062520/5681634f550346895dd3ee58/html5/thumbnails/15.jpg)
Intelligence
• Cephalopods– Complex Brains– Excellent Vision– Nervous System
controls Chromatophores
– Video, Kings of Camouflage: http://www.youtube.com/watch?v=2x-8v1mxpR0
• Photo Credit: Nick Hobgood, 2006, Wikimedia Commons
![Page 16: Mollusks and Annelids](https://reader036.vdocuments.net/reader036/viewer/2022062520/5681634f550346895dd3ee58/html5/thumbnails/16.jpg)
Centralized Nervous System
![Page 17: Mollusks and Annelids](https://reader036.vdocuments.net/reader036/viewer/2022062520/5681634f550346895dd3ee58/html5/thumbnails/17.jpg)
![Page 18: Mollusks and Annelids](https://reader036.vdocuments.net/reader036/viewer/2022062520/5681634f550346895dd3ee58/html5/thumbnails/18.jpg)
Phylum Annelida
• Segmented Worms• Oligochaetes – earthworms & relatives• Polychaetes• Leeches
![Page 19: Mollusks and Annelids](https://reader036.vdocuments.net/reader036/viewer/2022062520/5681634f550346895dd3ee58/html5/thumbnails/19.jpg)
Oligochaetes
Photo Credit of earthworm : Michael Linnenbach, 2005, Wikimedia Commons
![Page 20: Mollusks and Annelids](https://reader036.vdocuments.net/reader036/viewer/2022062520/5681634f550346895dd3ee58/html5/thumbnails/20.jpg)
Polychaetes
Photo Credit of Christmas Tree Worms : Nick Hobgood, 2005, Wikimedia Commons
![Page 21: Mollusks and Annelids](https://reader036.vdocuments.net/reader036/viewer/2022062520/5681634f550346895dd3ee58/html5/thumbnails/21.jpg)
Leeches
![Page 22: Mollusks and Annelids](https://reader036.vdocuments.net/reader036/viewer/2022062520/5681634f550346895dd3ee58/html5/thumbnails/22.jpg)
Characteristics of Annelids
• Bilateral Symmetry
• Triploblastic• Coelomate• Segmented• Trochophore
larvae• Photo Credit of Tomopteris: Courtesy
of uwe kils, 2005, Wikimedia Commons
![Page 23: Mollusks and Annelids](https://reader036.vdocuments.net/reader036/viewer/2022062520/5681634f550346895dd3ee58/html5/thumbnails/23.jpg)
![Page 24: Mollusks and Annelids](https://reader036.vdocuments.net/reader036/viewer/2022062520/5681634f550346895dd3ee58/html5/thumbnails/24.jpg)
Annelid Videos
• Giant Earthworm Video: http://www.youtube.com/watch?v=DZig6EL5B6A
• Leech Video from Science Now: – Short Version (podcast):
http://www.youtube.com/watch?v=cKUAroimQrk– Long Version with graphic surgery:
http://www.pbs.org/wgbh/nova/sciencenow/0305/01.html• (Warning: bloody pictures)
![Page 25: Mollusks and Annelids](https://reader036.vdocuments.net/reader036/viewer/2022062520/5681634f550346895dd3ee58/html5/thumbnails/25.jpg)
Incomplete vs. CompleteDigestive Systems
![Page 26: Mollusks and Annelids](https://reader036.vdocuments.net/reader036/viewer/2022062520/5681634f550346895dd3ee58/html5/thumbnails/26.jpg)
![Page 27: Mollusks and Annelids](https://reader036.vdocuments.net/reader036/viewer/2022062520/5681634f550346895dd3ee58/html5/thumbnails/27.jpg)
Animal Nutrition• Macronutrients:
– Carbohydrates– Lipids– Proteins
• Essential Nutrients– Essential Amino Acids– Essential Fatty Acids– Vitamins– Minerals
![Page 28: Mollusks and Annelids](https://reader036.vdocuments.net/reader036/viewer/2022062520/5681634f550346895dd3ee58/html5/thumbnails/28.jpg)
Transport
• Closed Circulatory System
• Hearts = Pumps• Blood Vessels = Pipes
– Arteries– Capillaries– Veins
• Blood = Fluid• Photo Credit: Dr. Stephen Bostic, 2008
![Page 29: Mollusks and Annelids](https://reader036.vdocuments.net/reader036/viewer/2022062520/5681634f550346895dd3ee58/html5/thumbnails/29.jpg)
![Page 30: Mollusks and Annelids](https://reader036.vdocuments.net/reader036/viewer/2022062520/5681634f550346895dd3ee58/html5/thumbnails/30.jpg)
Gas Exchange• Gills or Skin Surface• Respiratory Pigments
– Hemoglobin; Dissolved in blood (most common)
– Chlorocruorin (some polychaetes)
– Hemerythrin (some polychaetes)
– Photo Credit for Terebellid Polychaete: Matthias Buschmann, 2007, Wikimedia Commons
![Page 31: Mollusks and Annelids](https://reader036.vdocuments.net/reader036/viewer/2022062520/5681634f550346895dd3ee58/html5/thumbnails/31.jpg)
![Page 32: Mollusks and Annelids](https://reader036.vdocuments.net/reader036/viewer/2022062520/5681634f550346895dd3ee58/html5/thumbnails/32.jpg)
Excretory System: Metanephridia
![Page 33: Mollusks and Annelids](https://reader036.vdocuments.net/reader036/viewer/2022062520/5681634f550346895dd3ee58/html5/thumbnails/33.jpg)
Centralized Nervous System
![Page 34: Mollusks and Annelids](https://reader036.vdocuments.net/reader036/viewer/2022062520/5681634f550346895dd3ee58/html5/thumbnails/34.jpg)
The End
Unless otherwise specified, all images in this presentation came from:Campbell, et al. 2008. Biology, 8th ed. Pearson Benjamin Cummings.