The Characteristics of Phylum Cnidaria

The Characteristics of Phylum Cnidaria

Characteristics of Phylum CnidariaCharacteristics of Phylum Cnidaria

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

Radial Radial SymmetrySymmetry

Radial Radial SymmetrySymmetry

aboralaboral

oraloral

Radial SymmetryRadial SymmetryJellyfishJellyfish

Phylum CnidariaPhylum CnidariaJellyfishJellyfish

Phylum CnidariaPhylum Cnidaria

Characteristics of Phylum CnidariaCharacteristics of Phylum Cnidaria

radial symmetry

blind sac gut (= coelenteron or gastrovascular cavity)

diploblastic with mesoglea

polyp and medusa body forms

nematocysts (= specialized stinging capsules)

nerve net

lack excretory, circulatory & respiratory systems

complex life cycle

many colonial forms exhibiting polymorphism

radial symmetry

blind sac gut (= coelenteron or gastrovascular cavity)

diploblastic with mesoglea

polyp and medusa body forms

nematocysts (= specialized stinging capsules)

nerve net

lack excretory, circulatory & respiratory systems

complex life cycle

many colonial forms exhibiting polymorphism

Blind Sac GutBlind Sac Gut

Characteristics of Phylum CnidariaCharacteristics of Phylum Cnidaria

radial symmetry

blind sac gut (= coelenteron or gastrovascular cavity)

diploblastic with mesoglea

polyp and medusa body forms

nematocysts (= specialized stinging capsules)

nerve net

lack excretory, circulatory & respiratory systems

complex life cycle

many colonial forms exhibiting polymorphism

radial symmetry

blind sac gut (= coelenteron or gastrovascular cavity)

diploblastic with mesoglea

polyp and medusa body forms

nematocysts (= specialized stinging capsules)

nerve net

lack excretory, circulatory & respiratory systems

complex life cycle

many colonial forms exhibiting polymorphism

Diploblastic- two germ layersDiploblastic- two germ layersDiploblastic- two germ layersDiploblastic- two germ layersPhylum CnidariaPhylum CnidariaPhylum CnidariaPhylum Cnidaria

Characteristics of Phylum CnidariaCharacteristics of Phylum Cnidaria

radial symmetry

blind sac gut (= coelenteron or gastrovascular cavity)

diploblastic with mesoglea

polyp and medusa body forms

nematocysts (= specialized stinging capsules)

nerve net

lack excretory, circulatory & respiratory systems

complex life cycle

many colonial forms exhibiting polymorphism

radial symmetry

blind sac gut (= coelenteron or gastrovascular cavity)

diploblastic with mesoglea

polyp and medusa body forms

nematocysts (= specialized stinging capsules)

nerve net

lack excretory, circulatory & respiratory systems

complex life cycle

many colonial forms exhibiting polymorphism

NematocystsNematocysts

Nematocyst PictureNematocyst Picture

NematocystNematocyst

More NematocystsMore NematocystsMore NematocystsMore Nematocysts

http://www.youtube.com/watch?NR=1&v=-Tp38DUjUnM&feature=endscreen

Characteristics of Phylum CnidariaCharacteristics of Phylum Cnidaria

radial symmetry

blind sac gut (= coelenteron or gastrovascular cavity)

diploblastic with mesoglea

polyp and medusa body forms

nematocysts (= specialized stinging capsules)

nerve net

lack excretory, circulatory & respiratory systems

complex life cycle

many colonial forms exhibiting polymorphism

radial symmetry

blind sac gut (= coelenteron or gastrovascular cavity)

diploblastic with mesoglea

polyp and medusa body forms

nematocysts (= specialized stinging capsules)

nerve net

lack excretory, circulatory & respiratory systems

complex life cycle

many colonial forms exhibiting polymorphism

Nerve NetNerve Net

Characteristics of Phylum CnidariaCharacteristics of Phylum Cnidaria

radial symmetry

blind sac gut (= coelenteron or gastrovascular cavity)

diploblastic with mesoglea

polyp and medusa body forms

nematocysts (= specialized stinging capsules)

nerve net

lack excretory, circulatory & respiratory systems

complex life cycle

many colonial forms exhibiting polymorphism

radial symmetry

blind sac gut (= coelenteron or gastrovascular cavity)

diploblastic with mesoglea

polyp and medusa body forms

nematocysts (= specialized stinging capsules)

nerve net

lack excretory, circulatory & respiratory systems

complex life cycle

many colonial forms exhibiting polymorphism

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

Sea AnemonesSea AnemonesSea AnemonesSea Anemones

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

Characteristics of Phylum CnidariaCharacteristics of Phylum Cnidaria

radial symmetry

blind sac gut (= coelenteron or gastrovascular cavity)

diploblastic with mesoglea

polyp and medusa body forms

nematocysts (= specialized stinging capsules)

nerve net

lack excretory, circulatory & respiratory systems

complex life cycle

many colonial forms exhibiting polymorphism

radial symmetry

blind sac gut (= coelenteron or gastrovascular cavity)

diploblastic with mesoglea

polyp and medusa body forms

nematocysts (= specialized stinging capsules)

nerve net

lack excretory, circulatory & respiratory systems

complex life cycle

many colonial forms exhibiting polymorphism

The Cnidarian Life CycleThe Cnidarian Life Cycle

The Cnidarian Life CycleThe Cnidarian Life Cycle

Characteristics of Phylum CnidariaCharacteristics of Phylum Cnidaria

radial symmetry

blind sac gut (= coelenteron or gastrovascular cavity)

diploblastic with mesoglea

polyp and medusa body forms

nematocysts (= specialized stinging capsules)

nerve net

lack excretory, circulatory & respiratory systems

complex life cycle

many colonial forms exhibiting polymorphism

radial symmetry

blind sac gut (= coelenteron or gastrovascular cavity)

diploblastic with mesoglea

polyp and medusa body forms

nematocysts (= specialized stinging capsules)

nerve net

lack excretory, circulatory & respiratory systems

complex life cycle

many colonial forms exhibiting polymorphism

Coloniality and PolymorphismColoniality and Polymorphism

Poly,orphism in the Poly,orphism in the Portuguese Man- of-WarPortuguese Man- of-War

ColonialityColonialityCoral

Phylum CnidariaCoral

Phylum Cnidaria