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Week Two. Form and function – external and internal. Chapter 3 – Architecture of Fishes. Your Basic Fish …. Head. Protrusible jaws and kinetic skulls. Barbels. Spines. Spines and cirri. Cephalic lateral line. Cephalic lateral line. Olfaction. nares. External nares. Body form.
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Week Two Form and function – external and internal
Olfaction nares
Body form fusiform compressiform depressiform anguilliform
Body form filiform taeniform sagittiform globiform
Anal fin gonopodium
Primitive Heterocercal
More Advanced Abbreviate heterocercal
Most Advanced Homocercal
Pectoral girdle Pelvic girdle
Axial skeleton Appendicular skeleton
hagfish Jawless fish skulls lamprey
Cranium All vertebrates have: Brain Case Gill arch/jaw skeleton
Shark Skull Brain case Gills-Jaws