Chondrichthyes Flashcards
In vertebrate they come under ___ and under super class ____
(Chondricthyes)
Gnathastomata (w jaws)
Pisces bear (fins)
Habitat
Chondrichthyes
Marine
Body
Chondrichthyes
Streamlined w cartilagenous endoskeleton
Mouth
Chondrichthyes
Ventral
Notochord fate
Chondrichthyes
Persistent throughout life
Chondrichthyes
Gill slits
Separate without operculum(gill cover)
Skin of chondrichthyes
Tough w minute placoid scales
Chondrichthyes Teeth are modified w
And directed towards
Placoid scales
Backward
Are chondrichthyes predaceous
Yes
Presence of air bladder in chondrichthyes?
Consequences
No
Swim continuously
Heart of chondrichthyes
2 chamb
Electric organs present in
Torpedo
Chondrichthyes
Poison string in
Trygon (sting ray)
Blood of chondrichthyes
Cold (poikilothermous)
Reproduction in chondrichthyes
Dioecious
Internal fert
Viviparous
Chondrichthyes
In males, pelvic fins bear
Claspers
Scoliodon
Dog fish
Chondrichthyes
Pristis
Saw fish
Carcharodon
Great white fish
Trygon
Sting ray
Chondrichthyes