Sponges and Cnidarian Review

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Sponges and Cnidarian Review
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Sponges

• Which Phylum do Sponges belong to?
• Porifera
• What does Porifera mean?
• Pore-bearing
• For many years sponges were classed as plants.
  Why?

http//www.mbgnet.net/salt/animals/1sponge.jpg
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Sponges

• Why are Sponges now classified as animals?
• They do not produce their own food!
• Do sponges have tissues or organs?
• NO!
• Which type of symmetry do they have?
• Radial

http//t0.gstatic.com/images?qtbnANd9GcSsGkbJ53Y
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Sponges

• How do sponges get their food?
• Extract it from water as it flows through the
  sponge
• What are the openings known as that the water can
  flow through?
• Pores
• Which cells use their tails to remove food from
  the water?
• Collar cells

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Sponges

• What is the name for the large opening at the top
  of the sponge where the waste and new sponges
  exit?
• Osculum

http//www.enchantedlearning.com/subjects/inverteb
rates/sponge/spongex.GIF
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Sponges
http//api.ning.com/files/tvuiNan6mLB7oYWJb1zhJzEE
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Sponges

• What gives the sponge support?
• Spicules or the spikes
• How do they reproduce?
• Sexual reproduction
• Asexual reproduction
• Do their young stay next to them?
• No

http//www.microlabgallery.com/gallery/images/Spon
geSpicules.jpg
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Sponges

• What is the advantage of having their young swim
  away?
• They will not be competing for resources with
  them
• Facts!
• Sponges are sessile fused to the ground
• Larval stage is free swimming
• Radial symmetry helps them detect things all
  around themselves

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http//reefguide.org/pix/thumb2/orangeballsponge1.
jpg
http//reefguide.org/pix/pinklumpysponge1.jpg
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Cnidarians

• Includes jellyfish, coral, and sea anemones
• How do they move?
• Slow swimming or dont move at all
• Do they chase their prey?
• No, they move slowly they eat what they bump
  into

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Cnidarians
http//www.biologyeducation.net/wp-content/uploads
/101.jpg

• What do their use to kill or stun their prey?
• Stinging cells
• Cnidocytes cell name
• Nematocysts harpoon like structure that they
  fire once to stun the prey

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Cnidarians
http//4.bp.blogspot.com/-lj8m4KSwTaY/TZ4vlIMzTBI/
AAAAAAAAAXg/TlkHD1W2vI8/s1600/portuguese_man_o_war
.jpg
http//www.aloha.com/lifeguards/portjell.gif
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Cnidarians
http//t0.gstatic.com/images?qtbnANd9GcRFweStzZ-
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http//www.tampabay.com/multimedia/archive/00024/a
4s_manowar052308a_24572c.jpg
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Cnidarians Sea Anemone
http//3.bp.blogspot.com/_fU7LdRkUMVM/TToEo0hGQxI/
AAAAAAAADrM/5rKEwTwZyXM/s1600/Sea-Anemone.jpg
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Cnidarians - Coral
http//static.guim.co.uk/sys-images/Guardian/About
/General/2011/2/23/1298488013408/Coral-reef-near-F
iji-007.jpg
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Cnidarians
http//media.web.britannica.com/eb-media/39/72139-
035-550475BC.jpg

• What are the two body types that they can have?
• Polyp (sessile) Asexual
• Medusa (swimming or free-floating)Sexual

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Cnidarians

• What type of symmetry do they have?
• Radial
• They have a nerve net which they use to detect
  and sense what is around them
• Where does the undigested food go?
• Back through their mouth because they have only 1
  opening.

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http//4.bp.blogspot.com/-CdPPhQ21pqo/TV9-yy7y3UI/
AAAAAAAAAzw/ZKsbiXcmQ9w/s1600/800px-Clown_fish_swi
mming.jpg