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Biology Labc

Cnidaria, Platyhelmet, Perphoria

QuestionAnswer
Porifera To have pores: SPONGES!
Porifera; 5 characteristics Choanocytes sessile (not mobile as adults) asexual and sexual spicule and spongin fiber makes sxs no symmetry
Cnidaria To sting, like a nettle: Jelly fish! Sea Anenomes! Corals!
Cnidaria; 5 Characteristics Ectoderm, endoderm, mesoderm Stinging Barbs (cnidoblasts) Polyp and Medusae: plymorphic Wide array of chemical toxins available Presence of planula larva (least develouped part of jellyfish cycle
Platyhelminthes "flat, worms" Flatworms, flukes and tapeworms
PLatyhelminthes; 5 characteristics Ectoderm, mesoderm, and endoderm two way digestive tract bilateral symmetry dorsal, ventral, anterior and posterior eyespots and nervous system
Contact Inhibition not attracted to one another, but will aggregate when they come into contact
sessile not moving
ostia pores
canal systems ostia, incurrent and radial canals, and spongoceols, and osculum form the canal systems water flows through in a sponge
choanocytes flagella like projections moving water
spicules part of perifora structure
Spongin fiber perifora structure on demospongae and sclerospongia
spongocoel space in body of sponge
osculum opening at the top of the sponge
Three sponge configurations ascenoid (simple), sycanoid (baisic folding), luecanoid (complex folding)
Four Perforia Classes Calcera: Calcium Carbonate spicules Hexactinellida: Silica spicules Demospongiae: spicules and spongin Sclerospongiae: Calcium carbonate spicules, spongin fibers, calcium carbonate shell
Buds Accessory cylenders (asexual reproduction)
Name the two canal incurrent canal: runs externally radial canal: runs internally
Ostium Internal and external connected by prosopyles
commensalism when organisms live together without damaging each other
germ layers ectoderm, endoderm, mesoglia
Stinging Mechanism of Cnidarian Cnidocyte containing a nematocyst (tightly coiled structure with sharp barb)
Polymorphic stages Pollyp (sessile) and medusa (pelagic)
Cnidaria Classes Hydrozoa: polyp and medusa stage Scyohozoa: large medusa small pollyp Cubozoa: cubed bell medusa Anthosoa: only polyp stage
Hypostome Hypostomes is raised area that surrounds mouth
Buds/gonads asexual reproduction organs
basal disc how hydra attach to substrate
gastrovascular cavity gland cells secrete digestive enzymes in it. jellyfish have four with gonads and hydras have them posterior to the hypostome.
Stinging mechanism cnidocytes contain nematocysts and are located on tenticles of hydra
Gonads testes found near oral end and ovary is rounded elevation near basal end.
zooxanthalene some thing in a psuedosymbiotic relationship with coral?
auricles the points on side of head for tactile and olfactory fxs
negatively thigomatic the worms will flip over when put on their dorsal side
two-way digestive tract no anus present: nutrients and waste enter and leave through the same opening
Created by: hannahprt
 

 



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