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Activity 17: Activity 17: Phylum CnidariaPhylum CnidariaActivity 17: Activity 17: Phylum CnidariaPhylum CnidariaPre-Lab DiscussionPre-Lab DiscussionPre-Lab DiscussionPre-Lab Discussion
CNIDARIANSCNIDARIANSCNIDARIANSCNIDARIANS Includes radially Includes radially
symmetrical animalssymmetrical animals Most primitive Most primitive
eumetazoaneumetazoan– Exhibit tissue level Exhibit tissue level
organizationorganization DiploblasticDiploblastic tissues with tissues with
mesogleamesoglea Coeleteron/Coeleteron/
Gastrovascular cavity Gastrovascular cavity – with one openingwith one opening– Functions for Functions for
metabolism and as a metabolism and as a hydroskeletonhydroskeleton
Includes radially Includes radially symmetrical animalssymmetrical animals
Most primitive Most primitive eumetazoaneumetazoan– Exhibit tissue level Exhibit tissue level
organizationorganization DiploblasticDiploblastic tissues with tissues with
mesogleamesoglea Coeleteron/Coeleteron/
Gastrovascular cavity Gastrovascular cavity – with one openingwith one opening– Functions for Functions for
metabolism and as a metabolism and as a hydroskeletonhydroskeleton
CNIDARIAN CNIDARIAN SKELETONSSKELETONSCNIDARIAN CNIDARIAN SKELETONSSKELETONS
ExoskeletonExoskeleton– ChitinousChitinous– Calcareous Calcareous – Proteinaceous Proteinaceous
HydroskeletonHydroskeleton
ExoskeletonExoskeleton– ChitinousChitinous– Calcareous Calcareous – Proteinaceous Proteinaceous
HydroskeletonHydroskeleton
CNIDARIAN NERVOUS CNIDARIAN NERVOUS SYSTEMSYSTEMCNIDARIAN NERVOUS CNIDARIAN NERVOUS SYSTEMSYSTEM
ProtoneuronProtoneuron – primitive nervous system– primitive nervous system StatocystStatocyst – a.k.a. statoliths– a.k.a. statoliths
– – for gravityfor gravity OcelliOcelli – – primitive eyesprimitive eyes
ProtoneuronProtoneuron – primitive nervous system– primitive nervous system StatocystStatocyst – a.k.a. statoliths– a.k.a. statoliths
– – for gravityfor gravity OcelliOcelli – – primitive eyesprimitive eyes
CNIDARIAN CNIDARIAN LOCOMOTORY SYSTEMLOCOMOTORY SYSTEMCNIDARIAN CNIDARIAN LOCOMOTORY SYSTEMLOCOMOTORY SYSTEM
EpitheliomuscularEpitheliomuscular EpitheliomuscularEpitheliomuscular
NEMATOCYSTNEMATOCYSTNEMATOCYSTNEMATOCYST stinging organellestinging organelle For capturing prey and for For capturing prey and for
defensedefense Within speciallized cells called Within speciallized cells called
CNIDOCYTESCNIDOCYTES Releases Releases NEUROTOXINSNEUROTOXINS
stinging organellestinging organelle For capturing prey and for For capturing prey and for
defensedefense Within speciallized cells called Within speciallized cells called
CNIDOCYTESCNIDOCYTES Releases Releases NEUROTOXINSNEUROTOXINS
CNIDARIANCNIDARIAN POLYMORPHISMPOLYMORPHISMCNIDARIANCNIDARIAN POLYMORPHISMPOLYMORPHISM POLYPPOLYP – cylindrical– cylindrical MEDUSAMEDUSA – umbrella-– umbrella-
shapedshaped
POLYPPOLYP – cylindrical– cylindrical MEDUSAMEDUSA – umbrella-– umbrella-
shapedshaped
MONOECIOUSMONOECIOUS DIOECIOUSDIOECIOUS
MONOECIOUSMONOECIOUS DIOECIOUSDIOECIOUS
Ovary
Testis
TestisTestis
TestisTestisTestisTestis
TestisTestisTestis Testis
Testis
CNIDARIANCNIDARIAN LIFE CYCLELIFE CYCLECNIDARIANCNIDARIAN LIFE CYCLELIFE CYCLE POLYPPOLYP – cylindrical– cylindrical MEDUSAMEDUSA – –
umbrella-shapedumbrella-shaped
POLYPPOLYP – cylindrical– cylindrical MEDUSAMEDUSA – –
umbrella-shapedumbrella-shaped
ClassesClassesClassesClasses
HydrozoaHydrozoa ScyphozoaScyphozoa CubozoaCubozoa AnthozoaAnthozoa
– Subclass ZoanthariaSubclass Zoantharia– Subclass CeriantipathariaSubclass Ceriantipatharia– Subclass AlconariaSubclass Alconaria
HydrozoaHydrozoa ScyphozoaScyphozoa CubozoaCubozoa AnthozoaAnthozoa
– Subclass ZoanthariaSubclass Zoantharia– Subclass CeriantipathariaSubclass Ceriantipatharia– Subclass AlconariaSubclass Alconaria
OBSERVE THE OBSERVE THE FOLLOWING:FOLLOWING:OBSERVE THE OBSERVE THE FOLLOWING:FOLLOWING: Hydra Hydra – – microscopicmicroscopic Obelia Obelia – – microscopic microscopic Physalia Physalia – Portuguese Man O’ War– Portuguese Man O’ War Aurelia Aurelia – true jelly fish; moon jelly– true jelly fish; moon jelly Metridium Metridium – sea anemone– sea anemone Antipathes Antipathes – black coral– black coral Fungia Fungia – Mushroom coral– Mushroom coral Tubipora Tubipora – organ pipe coral– organ pipe coral
Hydra Hydra – – microscopicmicroscopic Obelia Obelia – – microscopic microscopic Physalia Physalia – Portuguese Man O’ War– Portuguese Man O’ War Aurelia Aurelia – true jelly fish; moon jelly– true jelly fish; moon jelly Metridium Metridium – sea anemone– sea anemone Antipathes Antipathes – black coral– black coral Fungia Fungia – Mushroom coral– Mushroom coral Tubipora Tubipora – organ pipe coral– organ pipe coral
Hydra
Obelia
Metridium Fungia
Physalia
Tubipora
Aurelia
Acropora
…….Start.Start…….Start.Start
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