osteichthyes Flashcards
1
Q
common name, examples
A
bony fish
- any fish
- ray finned, lobe finned
2
Q
skeleton
A
stiff bone, reinforced by calcium salts
3
Q
describe smell and sight
A
- good smell
- acute eyesight
4
Q
Adaptations to remain buoyant
A
- swim bladder
- operculum covering gills, able to breathe without swimming
- pectoral, pelvic and dorsal fins as stabilizer
5
Q
Reproduction
A
- external fert: eggs released to water
- external development
6
Q
describe their heart/circulatory sustem
A
two chambered tubular heart, atrium and ventricle
- closed, high pressure
7
Q
other features
A
- paired fins
- discrete muscle blocks (MYOMERES)
- teeth
- dermal scales
- numerous vertebrae
8
Q
ray finned fish
A
thin, flexible, skeletal rays
9
Q
lobe finned fish
A
muscular fins, supported by bones (only 1 species)
