s

class reptilia

reptiles

reptiles skin

keratinized scales

large keratinized scales

scutes

what blood do reptiles have

Heterothermic

reptile heart

3 chambered heart, partially divided ventricle

Amniotic Egg

reproduction for reptiles

oviparous

eggs laid externally

ovoviviparous

eggs retained within body

viviparous

no egg shell formed

order rynchocephalia

tuatara/sphenodon

where is the tuatara found?

off the coast of new zeland

order chelonia

turtles (testudines)

top shell of turtles

carapace

bottom of turtle shell

plastron

tortoises

terrestrial turtles

terrapins

hard shelled freshwater turtles

order crocodilian

crocodiles, caimans, ghavials, alligators

order squamata

snakes and lizards

jacobson’s organs

pits in the roof of the mouth that are used for smell.

chromatophores

color changing skin

class aves

birds, over 10,000 species

down feathers

soft, billowy, feather near the skin, used for insulation

flight feathers

feathers for the wing and tail

contour feathers

feathers of the body/torso

warm blooded

homeothermic

precocial

ground nesters, long incubation, mature hatchlings

altrical

nest high, short incubation, immature hatchlings

syrinx

vocal organ, more developed in males

bones of aves

lightweight and hollow

prototherians

platypus

monotremes

echidna

metatherians

kangroo’s

marsupials

wallaby, koala, opossum

eutherians

placental mammals

incisors

flat, beveled edge, chisel-like teeth for biting into things, gnawing, scraping, etc.

canines

sharp, pointed beveled teeth for stabbing, ripping, tearing, etc.

premolars

flat, broad teeth for grinding and crushing.  Have two raised beveled edges “bicuspids”

true molars

flat, broad teeth for grinding and crushing.  Have three raised beveled edges  “tricuspids”