Transcript
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!
PORIFERA=>•3 types of “skeleton”:–spongin (flexible protein)
spongin fibers
PORIFERA=>•3 types of “skeleton”:–spongin (flexible protein)
–CaCO3- shallow marine “spicules”
PORIFERA=>•3 types of “skeleton”:–spongin (flexible protein)
–CaCO3- shallow marine
–SiO2- deep marine
•some have all three•ANATOMY & REPRODUCTION:
sponge larva
gemmule
encrusting sponge
encrusting sponge
CNIDARIA=>•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”
CNIDARIA=>•have RADIAL SYMMETRY•all have CNIDOCYTES: “stinging cells”
•3 major functional types:
especiallycommon
type
CNIDARIA=>•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...
HydrozoaScyphozoaAnthozoaCubozoa
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
branching hydroid
SCYPHOZOA=>•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
zooxanthellae
CaCO3 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 Sea Wasp:Chironex Fleckeri
CTENOPHORA=>•translates as: “comb holder”•the “comb jellies”•no stinging cells –have colloblasts instead (sticky)•move via cilia
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