Chordates

what are the major vertebrate groups

• Fishes

• Amphibians

• Reptiles

• Birds

• mammals

Operculum

protects the gills, the fish can open and close them so they can obtain water to obtain oxygen

fish characteristics

• gills

• jaws(most) and paired appendages (fins) 

• Operculum, swim bladder (bony fishes)

amphibian characteristic (think of ferns and mosses)

has to have water for reproduction

shape of a crocodile nose

V-shape

shape of an alligator nose

U-shape

reptile characteristic

dont need water to live or reproduce in

cold blooded and use the environment to control their body temperature (ectotherms)

Reptiles

ecto

outer

amniotic egg

water tight with 4 distinct membranes

4 membranes of the amniotic egg

amnion, allantois, yolksac, and chorion

Amnion membrane(think of the fluid)

surrounds baby

yolk sac

food and nutrients for development

allantois

gas and liquid waste

chorion (think of the placenta)

the amniotic layer

endothermic

generate metabolic heat for bodu temp

what lives part of its life in water and the other on land

Amphibians

aquatic mammals

dolphins and whales

what do amniotic eggs have that mammal development doesnt

allitos

where does the waste go from an embryonic mammal

the blood stream of the mother

whats cool about a platypus and an anteater

they lay eggs and produce milk

distinction of a mammal

they produce milk

monotremes

lay eggs

marsupials

have a pouch (kangaroos)

eutherians

95% placentals

most species of birds are?

song birds