Post on 11-Nov-2018
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BIO2135 – Animal Form and Function
Phylum Cnidaria● Miller and Harley Chap. 9
BIO2135 – Animal Form and Function
Cnidarian Phylogeny
Fig. 9.1
BIO2135 – Animal Form and Function
Number of Species
9000+ species
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BIO2135 – Animal Form and Function
Cnidarian Lifecycle
Fig. 9.10
N.B. Incomplete Digestive Tube
BIO2135 – Animal Form and Function
Taxonomy of Phylum Cnidaria• Class Anthozoa• Solitary or colonial polyps• Class Staurozoa• Only solitary polyps• Class Cubozoa• Medusa prominent, cuboid• Class Scyphozoa• Medusa prominent, cnidocytes
in ectodermis & endodermis• Class Hydrozoa• Polyps prominent, often colonial,
cnidocytes in ectodermis
BIO2135 – Animal Form and Function
Hydrostatic Skeleton
Fig. 23.10
bands
bands
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BIO2135 – Animal Form and Function
Cnidocytes
Fig. 9.9
BIO2135 – Animal Form and Function
Firing the Cnidocytes
BIO2135 – Animal Form and Function
Firing the Cnidocytes
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BIO2135 – Animal Form and Function
Body Wall
Fig. 9.8
BIO2135 – Animal Form and Function
Extra vs. Intra-cellular
Digestion
Fig. 27.2
BIO2135 – Animal Form and Function
Polyp Feeding
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BIO2135 – Animal Form and Function
Anthozoa AnatomyFig. 9.19
BIO2135 – Animal Form and Function
ScyphozoaAnatomy
Fig. 9.15
BIO2135 – Animal Form and Function
Scyphozoa Life Cycle
Fig. 9.16Strobilization
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BIO2135 – Animal Form and Function
Rhopalium
Tentacle
Pedalium
Cubozoa Anatomy
BIO2135 – Animal Form and Function
Hydrozoa Anatomy
Fig. 9.12
BIO2135 – Animal Form and Function
Hydrozoan Lifecycle
Fig. 9.11
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BIO2135 – Animal Form and Function
Medusa Locomotion
BIO2135 – Animal Form and Function
Nerve Net
Fig. 24.7
BIO2135 – Animal Form and Function
Diffusion for Respiration/Excretion
Figs. 26.1 & 26.11
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BIO2135 – Animal Form and Function
Ecology
BIO2135 – Animal Form and Function
Ctenophora
Fig. 9.22
Colloblast
BIO2135 – Animal Form and Function
Phosphorescent Comb Jellies
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BIO2135 – Animal Form and Function
Next Class- Platyhelminthes
● Miller and Harley Chap. 10