The Characteristics of Phylum Cnidaria

The Characteristics of Phylum Cnidaria

Characteristics of Phylum CnidariaCharacteristics of Phylum Cnidaria

Biology 200Coral ReefsBiology 200Coral Reefs

radial symmetryblind sac gut (= coelenteron or gastrovascular cavity)diploblastic with mesogleapolyp and medusa body formsnematocysts (= specialized stinging capsules)nerve netlack excretory, circulatory & respiratory systemscomplex life cyclemany colonial forms exhibiting polymorphism

radial symmetryblind sac gut (= coelenteron or gastrovascular cavity)diploblastic with mesogleapolyp and medusa body formsnematocysts (= specialized stinging capsules)nerve netlack excretory, circulatory & respiratory systemscomplex life cyclemany colonial forms exhibiting polymorphism

Characteristics of Phylum CnidariaCharacteristics of Phylum Cnidaria

Biology 200Coral ReefsBiology 200Coral Reefsradial symmetryblind sac gut (= coelenteron or gastrovascular cavity)diploblastic with mesogleapolyp and medusa body formsnematocysts (= specialized stinging capsules)nerve netlack excretory, circulatory & respiratory

systemscomplex life cyclemany colonial forms exhibiting polymorphism

radial symmetryblind sac gut (= coelenteron or gastrovascular cavity)diploblastic with mesogleapolyp and medusa body formsnematocysts (= specialized stinging capsules)nerve netlack excretory, circulatory & respiratory

systemscomplex life cyclemany colonial forms exhibiting polymorphism

aboralaboral

oraloralBiology 200Coral ReefsBiology 200Coral Reefs

Radial Symmetry

Radial Radial SymmetrySymmetry

Characteristics of Phylum CnidariaCharacteristics of Phylum Cnidaria

Biology 200Coral ReefsBiology 200Coral Reefs

radial symmetryblind sac gut (= coelenteron or gastrovascular cavity)diploblastic with mesogleapolyp and medusa body formsnematocysts (= specialized stinging capsules)nerve netlack excretory, circulatory & respiratory systemscomplex life cyclemany colonial forms exhibiting polymorphism

radial symmetryblind sac gut (= coelenteron or gastrovascular cavity)diploblastic with mesogleapolyp and medusa body formsnematocysts (= specialized stinging capsules)nerve netlack excretory, circulatory & respiratory systemscomplex life cyclemany colonial forms exhibiting polymorphism

Blind Sac GutBlind Sac GutBlind Sac Gut

Biology 200Coral ReefsBiology 200Coral Reefs

Characteristics of Phylum CnidariaCharacteristics of Phylum Cnidaria

Biology 200Coral ReefsBiology 200Coral Reefs

radial symmetryblind sac gut (= coelenteron or gastrovascular cavity)diploblastic with mesogleapolyp and medusa body formsnematocysts (= specialized stinging capsules)nerve netlack excretory, circulatory & respiratory systemscomplex life cyclemany colonial forms exhibiting polymorphism

radial symmetryblind sac gut (= coelenteron or gastrovascular cavity)diploblastic with mesogleapolyp and medusa body formsnematocysts (= specialized stinging capsules)nerve netlack excretory, circulatory & respiratory systemscomplex life cyclemany colonial forms exhibiting polymorphism

DiploblasticDiploblasticDiploblastic

(from the endoderm)

(from the ectoderm)

Biology 200Coral ReefsBiology 200Coral Reefs

Characteristics of Phylum CnidariaCharacteristics of Phylum Cnidaria

Biology 200Coral ReefsBiology 200Coral Reefs

radial symmetryblind sac gut (= coelenteron or gastrovascular cavity)diploblastic with mesogleapolyp and medusa body formsnematocysts (= specialized stinging capsules)nerve netlack excretory, circulatory & respiratory systemscomplex life cyclemany colonial forms exhibiting polymorphism

radial symmetryblind sac gut (= coelenteron or gastrovascular cavity)diploblastic with mesogleapolyp and medusa body formsnematocysts (= specialized stinging capsules)nerve netlack excretory, circulatory & respiratory systemscomplex life cyclemany colonial forms exhibiting polymorphism

EPIDERMIS

MESOGLEA

MOUTH

GUT

GASTRODERMIS

TENTACLE

COLUMN

ABORAL

ORAL

POLYP ANATOMY

Medusa Body FormMedusa Body Form

GUT

MOUTH

EPIDERMIS

MESOGLEAGASTRODERMIS

GONAD

MEDUSA ANATOMY

Characteristics of Phylum CnidariaCharacteristics of Phylum Cnidaria

Biology 200Coral ReefsBiology 200Coral Reefs

radial symmetryblind sac gut (= coelenteron or gastrovascular cavity)diploblastic with mesogleapolyp and medusa body formsnematocysts (= specialized stinging capsules)nerve netlack excretory, circulatory & respiratory systemscomplex life cyclemany colonial forms exhibiting polymorphism

radial symmetryblind sac gut (= coelenteron or gastrovascular cavity)diploblastic with mesogleapolyp and medusa body formsnematocysts (= specialized stinging capsules)nerve netlack excretory, circulatory & respiratory systemscomplex life cyclemany colonial forms exhibiting polymorphism

NematocystsNematocysts

Nematocyst PictureNematocyst Picture

NematocystNematocyst

Biology 200Coral Reefs More NematocystsMore NematocystsMore NematocystsBiology 200Coral Reefs

Characteristics of Phylum CnidariaCharacteristics of Phylum Cnidaria

Biology 200Coral ReefsBiology 200Coral Reefs

radial symmetryblind sac gut (= coelenteron or gastrovascular cavity)diploblastic with mesogleapolyp and medusa body formsnematocysts (= specialized stinging capsules)nerve netlack excretory, circulatory & respiratory systemscomplex life cyclemany colonial forms exhibiting polymorphism

radial symmetryblind sac gut (= coelenteron or gastrovascular cavity)diploblastic with mesogleapolyp and medusa body formsnematocysts (= specialized stinging capsules)nerve netlack excretory, circulatory & respiratory systemscomplex life cyclemany colonial forms exhibiting polymorphism

Nerve NetNerve Net

Biology 200Coral ReefsBiology 200Coral Reefs

Characteristics of Phylum CnidariaCharacteristics of Phylum Cnidaria

Biology 200Coral ReefsBiology 200Coral Reefs

radial symmetryblind sac gut (= coelenteron or gastrovascular cavity)diploblastic with mesogleapolyp and medusa body formsnematocysts (= specialized stinging capsules)nerve netlack excretory, circulatory & respiratory systemscomplex life cyclemany colonial forms exhibiting polymorphism

radial symmetryblind sac gut (= coelenteron or gastrovascular cavity)diploblastic with mesogleapolyp and medusa body formsnematocysts (= specialized stinging capsules)nerve netlack excretory, circulatory & respiratory systemscomplex life cyclemany colonial forms exhibiting polymorphism

Diffusion Across the Body WallDiffusion Across the Body WallDiffusion Across the Body Wall

Biology 200Coral ReefsBiology 200Coral Reefs

Sea AnemonesSea AnemonesSea Anemones

Circulation in a Moon JellyfishCirculation in a Circulation in a Moon JellyfishMoon Jellyfish

Biology 200Coral ReefsBiology 200Coral Reefs

Characteristics of Phylum CnidariaCharacteristics of Phylum Cnidaria

Biology 200Coral ReefsBiology 200Coral Reefs

radial symmetryblind sac gut (= coelenteron or gastrovascular cavity)diploblastic with mesogleapolyp and medusa body formsnematocysts (= specialized stinging capsules)nerve netlack excretory, circulatory & respiratory systemscomplex life cyclemany colonial forms exhibiting polymorphism

radial symmetryblind sac gut (= coelenteron or gastrovascular cavity)diploblastic with mesogleapolyp and medusa body formsnematocysts (= specialized stinging capsules)nerve netlack excretory, circulatory & respiratory systemscomplex life cyclemany colonial forms exhibiting polymorphism

The The Cnidarian Cnidarian Life CycleLife Cycle

The CnidarianLife CycleThe CnidarianLife Cycle

Characteristics of Phylum CnidariaCharacteristics of Phylum Cnidaria

Biology 200Coral ReefsBiology 200Coral Reefs

radial symmetryblind sac gut (= coelenteron or gastrovascular cavity)diploblastic with mesogleapolyp and medusa body formsnematocysts (= specialized stinging capsules)nerve netlack excretory, circulatory & respiratory systemscomplex life cyclemany colonial forms exhibiting polymorphism

radial symmetryblind sac gut (= coelenteron or gastrovascular cavity)diploblastic with mesogleapolyp and medusa body formsnematocysts (= specialized stinging capsules)nerve netlack excretory, circulatory & respiratory systemscomplex life cyclemany colonial forms exhibiting polymorphism

Coloniality and PolymorphismColoniality and Polymorphism

Biology 200Coral ReefsBiology 200Coral Reefs

Poly,orphism in the Poly,orphism in the Portuguese ManPortuguese Man-- ofof--WarWar