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Sponges&Cnidarians 08

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Information about Sponges&Cnidarians 08
Education

Published on December 2, 2008

Author: erinNly

Source: slideshare.net

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Sponges, Cnidarians & Ctenophores

 

 

 

 

This is a “loofah sponge”… … which is most certainly NOT A SPONGE!

A “loofah” is a type of gourd.

 

PORIFERA=> “ sponges” 1st multicellular life? over 10000 known species sessile/asymmetry teacup-sized sponge can filter 5000L of water in a day !

“ sponges”

1st multicellular life?

over 10000 known species

sessile/asymmetry

teacup-sized sponge can filter 5000L of water in a day !

PORIFERA=> 3 types of “skeleton”: spongin (flexible protein)

3 types of “skeleton”:

spongin (flexible protein)

spongin fibers

PORIFERA=> 3 types of “skeleton”: spongin (flexible protein) CaCO 3 - shallow marine “spicules”

3 types of “skeleton”:

spongin (flexible protein)

CaCO 3 - shallow marine “spicules”

 

PORIFERA=> 3 types of “skeleton”: spongin (flexible protein) CaCO 3 - shallow marine SiO 2 - deep marine some have all three ANATOMY & REPRODUCTION:

3 types of “skeleton”:

spongin (flexible protein)

CaCO 3 - shallow marine

SiO 2 - deep marine

some have all three

ANATOMY & REPRODUCTION:

 

 

 

sponge larva

gemmule

 

 

 

 

encrusting sponge

encrusting sponge

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The CNIDARIANS

 

CNIDARIA=> More than 9000 species Includes sea anemones, jellyfish, corals, hydras, More highly organized than sponges, but still very simple animals

More than 9000 species

Includes sea anemones, jellyfish, corals, hydras,

More highly organized than sponges, but still very simple animals

CNIDARIA=> Amazing predators for their simplicity hollow chamber called the: GASTROVASCULAR CAVITY -digestion & food distribution nervous system is called a: “nerve net”

Amazing predators for their simplicity

hollow chamber called the: GASTROVASCULAR CAVITY -digestion & food distribution

nervous system is called a: “nerve net”

CNIDARIA=> have RADIAL SYMMETRY all have CNIDOCYTES: “stinging cells” 3 major functional types:

have RADIAL SYMMETRY

all have CNIDOCYTES: “stinging cells”

3 major functional types:

especially common type

 

 

 

 

 

 

 

 

 

CNIDARIA=> have TWO main “body plans”: the POLYP and MEDUSA POLYP is sessile and asexual MEDUSA is sexual and free-swimming

have TWO main “body plans”:

the POLYP and MEDUSA

POLYP is sessile and asexual

MEDUSA is sexual and free-swimming

 

 

 

 

 

Describe two possible benefits to an algae that resides inside a cnidarian. Describe two possible benefits to an animal which has algae living within its tissue...

Describe two possible benefits to an algae that resides inside a cnidarian.

Describe two possible benefits to an animal which has algae living within its tissue...

Hydrozoa Scyphozoa Anthozoa Cubozoa

HYDROZOA=> includes over 3,700 species polyp phase dominant Most members are colonial Different polyps have different functions includes Hydra, Obelia and the Portuguese man O’ war

includes over 3,700 species

polyp phase dominant

Most members are colonial

Different polyps have different functions

includes Hydra, Obelia and the Portuguese man O’ war

 

 

 

 

branching hydroid

 

 

 

 

 

 

 

 

SCYPHOZOA=> translates to “cup animals” medusa is dominant The “jellyfish” - more than 200 sp. Most are found floating in the open sea

translates to “cup animals”

medusa is dominant

The “jellyfish” - more than 200 sp.

Most are found floating in the open sea

 

 

 

 

 

 

 

West coast Sea nettle

 

 

ANTHOZOA=> translates as: “flower animals” never a medusoid stage includes sea anemones, soft corals, and true “stony” corals

translates as: “flower animals”

never a medusoid stage

includes sea anemones, soft corals, and true “stony” corals

 

 

 

 

 

 

 

zooxanthellae

CaCO 3 skeletons

 

 

 

 

 

 

 

CUBOZOA=> the “box jellies” have a square shape when viewed from above possess four evenly-spaced tentacles (or groups of tentacles) found mostly in tropical oceans have a primitive version of an “eye” ~ 20 species

the “box jellies”

have a square shape when viewed from above

possess four evenly-spaced tentacles (or groups of tentacles)

found mostly in tropical oceans

have a primitive version of an “eye”

~ 20 species

 

The Sea Wasp: Chironex Fleckeri

CTENOPHORA=> translates as: “comb holder” the “comb jellies” no stinging cells –have colloblasts instead (sticky) move via cilia

translates as: “comb holder”

the “comb jellies”

no stinging cells –have colloblasts instead (sticky)

move via cilia

 

 

 

 

 

 

 

 

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