Chordates Flashcards
All chordates have ____ cords
nerve
Define Urochordata
Only larvae have notochord
Define Cephalochordata
Retain notochord throughout adulthood, but “muscle- like” for burrowing
Define Vertebrata
Notochord becomes backbone.
All Vertebrates have _____ circulatory system
closed
All Vertebrates have ______ symmetry
bilateral
All Vertebrates have what type of coelem?
True coelom
All Vertebrates have _ germ layers
3
All Vertebrates have type of skeleton
endoskelton
How do all vertebrates reproduce?
sexual reproduction
What does Endothermic mean
warm-blooded
What does Ectothermic mean
cold-blooded
Jawless fish have what type of mouth?
sucker like mouth (no jaws)
Do jawless fish have fins?
no
Describe jawless fish skeletons
Cartilage skeleton
Example of jawless fish
lamprey & hagfish
What is the skeleton of cartilage fish like?
cartilage… duh
What is the circulatory system of cartilage fish like?
2 chambered hearts
What is the lateral line system for?
detecting vibrations
Describe the nervous system of cartilage fish
poor eyesight, great olfactory
Examples of cartilage fish
sharks, skates, rays
Do cartilage fish have a lateral line system?
yes
What is the circulatory system of bony fish like?
2 chambered hearts
Do bony fish have a lateral line sytem?
yes
Do bony fish have a swim bladder?
yes
bony fish have _______ over gills
operculum
Describe the nervous system of bony fish
good smell and eyesight
Examples of bony fish
perch, bass, flounder
Amphibia were the first what?
land vertebraes
Describe the circulatory system of amphibians
3 chambered hearts
How do amphibians respire?
through skin/lungs
Amphibians need _____ to breed
water
Do amphibians have scales or claws?
no
Describe the circulatory system of reptiles
imperfect 4 chambered hearts
Describe the skin of reptiles
dry and scaly
Reptiles lay _______ eggs
amniotic
Birds have what for insulation?
down feathers
What makes birds lighter?
air sacs and hollow bones
Birds have _ chambered hearts
4
Are eggs internally or externally fertilized in birds?
internally
Birds lay ________ eggs
amniotic
In placental mammals, young develops where?
in uterus
In marsupials, young develops where?
inside pouch
In monotremes, young develops where?
in eggs
What are chiroptera?
bats
What are carnivora?
dogs, cats, bears, raccoons
What are rodentia?
rodents
What are insectivora?
long snoutted mammals. ex: shrews, moles
What are cetacea?
whales, dolphins
What is imprinting?
A process whereby a young animal follow the characteristics of his/her mother after hatching
What is estivation?
prolonged torpor or dormancy of an animal during a hot or dry period.
What is oviparous?
producing young by means of eggs that are hatched after they have been laid by the parent.
What is viviporous?
birthing live young that have developed inside the body of the parent.
What is oviviviporous?
producing eggs that are hatched within the body, so that the young are born alive but without placental attachment, as certain reptiles or fishes.
