3.6 day 2 Flashcards
Vertebrate features
Notochord
rod shaped structre used for the attachment if movement muscles which is replaced by a spine
Vertebrate features
Nerve Chord
Tube shaped cord present in the embryo which becomes the brain and spinal cord
Major group of fish
Chondrichthyes
- skeleton made of cartilage
- use fins for movement
- ex.) sharks and rays
Major group of fish
Osteichtyes
-bony fish
-skeleton made of bone
-haven an air sac called a swim bladder which allows them to rise and sink in water
-Ex.) tuna, guppies, salmon
Main group of amphibians
Anura
Ex.) frogs,toads
Main group of amphibians
Urodela
ex.) salamanders
main orders of reptiles
Sqaumta
- lizards and snakes
Testudines
- turtles and tortoises
Crocodilia
- aligators and crocodiles
what is an endotherm
-have hallow bones and generate their own body heat
what is an ectotherm
fish, amphibians and reptiles are enctotherms - they absorb heat from their surroundings (snakes g=absorbing heat from thier tank lamp)
What is the class of birds
Aves
What is the class of reptiles
reptilia
what is the class of mammals
Mammaila
distinctive features of mammilias
- covered in hair
- -mammary glands to produce milk to the offspring
Monotreme
one of the three groups of mammals
-mammal that lays eggs
- only 2: platypus and spiny anteater
Marsupials
one of the three groups of mammals
-pouched mammals
- born early and continue to develope in their mothers pouch
- ex.) kangaroos, koalas, opposum
