sponges cnidarians and platyhelminthes
Download
Skip this Video
Download Presentation
Sponges, Cnidarians and Platyhelminthes

Loading in 2 Seconds...

play fullscreen
1 / 36

Sponges, Cnidarians and Platyhelminthes - PowerPoint PPT Presentation


  • 98 Views
  • Uploaded on

Sponges, Cnidarians and Platyhelminthes. BIOL 1407. Invertebrates. Animals without backbones Most animals. Sponges. Porifera ≠ clade Two possible phyla: Silicea (most sponges) Calcarea Photo Credit: BIOL 1407 Student. Characteristics of Sponges. Cellular organization

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Sponges, Cnidarians and Platyhelminthes' - kaseem-bond


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
invertebrates
Invertebrates
  • Animals without backbones
  • Most animals
sponges
Sponges
  • Porifera ≠ clade
  • Two possible phyla:
    • Silicea (most sponges)
    • Calcarea
  • Photo Credit: BIOL 1407 Student
characteristics of sponges
Characteristics of Sponges
  • Cellular organization
  • Radial or no symmetry
  • Photo Credit: BIOL 1407 Student
characteristics of sponges1
Characteristics of Sponges
  • Filter feeders
  • Aquatic
  • Sessile
  • Photo Credit: Mila Zinkova, 2008, Wikimedia Commons
cell types
Cell Types
  • Choanocytes
  • Amoebocytes
  • Epidermal cells
  • Porocytes (in some)
skeleton
Skeleton
  • Spicules
    • Calcium carbonate
    • Silica
  • Spongin
    • Collagen protein
  • Photo Credit for bath sponges: Alcinoe, 2005, Wikimedia Commons
  • Photo Credit for Venus’ Flower Basket: NOAA, 2002
phylum cnidaria
Phylum Cnidaria
  • Hydroids (Hydra, Obelia)
    • http://www.youtube.com/watch?v=12OmszObAkM&feature=related
  • Corals and Sea Anemones
  • Jellies
  • Cubozoans (sea wasps)
hydroids
Hydroids

Photo Credit for Portuguese Man o’ War:

UNK Vieques 2008 Field Trip

corals and sea anemones
Corals and Sea Anemones

Photo Credit for Hard Coral: BIOL 1407 Student

characteristics of cnidarians
Characteristics of Cnidarians
  • Radial symmetry
  • Diploblastic
    • Epidermis
    • Gastrodermis
    • Mesoglea
  • Gastrovascular Cavity
  • Tentacles with cnidocytes
exchange processes
Exchange Processes
  • Body wall  Two layers of cells
  • Cell transport occurs at both layers
    • Water Balance
    • Ion Balance
    • Waste Disposal
    • Gas Exchange
digestion
Digestion
  • Two forms
    • Intracellular
    • Extracellular
  • Extracellular digestion  major evolutionary advance
  • Allows animals to eat things larger than their cells
  • Video:http://www.youtube.com/watch?v=M3VSvyxrwXA
transport
Transport
  • As cnidarian moves, water moves through GVC
  • GVC serves as transport system
  • Video: http://www.youtube.com/watch?v=oCJwHogXtKE&eurl=http://video.aol.com/video-detail/jellyfish-swimming-monterey-bay-aquarium/1285587528
platyhelminthes
Platyhelminthes
  • Free-living Flatworms
    • Planarians
    • Marine Flatworms
  • Flukes
  • Tapeworms
planarian and marine flatworm
Planarian and Marine Flatworm

Photo Credit of planarian: Dr. Stephen Bostic, 2008

characteristics of platyhelminths
Characteristics of Platyhelminths
  • Bilateral Symmetry
  • Triploblastic
  • Acoelomate
  • Gastrovascular Cavity
    • Extensive branching
  • Flat body
  • Photo Credit: Richard Ling, 2005, Flickr
exchange processes1
Exchange Processes
  • Body is flat and thin  ↑ Surface Area
  • Highly branched GVC  ↑ Surface Area
  • Cell transport occurs at both places
    • Water Balance
    • Ion Balance
    • Waste Disposal
    • Gas Exchange

Photo Credit of planarian:

Dr. Stephen Bostic, 2008

transport1
Transport
  • GVC serves as transport system
  • Video: http://www.youtube.com/watch?v=A6N8KZqGAJg&feature=related
  • Photo Credit: Richard Ling, 2006, Flickr
the end

The End

Unless otherwise specified, all images in this presentation came from:

Campbell, et al. 2008. Biology, 8th ed. Pearson Benjamin Cummings.

ad