Reptiles, Birds, & Mammals. Reptiles Class Reptilia Vertebrate with dry, scaly skin, lungs, and hard shelled eggs with several membranes (amniotic eggs)

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Presentation transcript:

Reptiles, Birds, & Mammals

Reptiles Class Reptilia Vertebrate with dry, scaly skin, lungs, and hard shelled eggs with several membranes (amniotic eggs) 3 chambered heart Cold blooded (ectotherm)

Groups of Reptiles Order Squamata : Lizards & Snakes

Order Crocodilia : alligators, crocodiles, & caimans,

Order Testudines: Turtles and Tortoises

Birds Class Aves Reptilelike animals with an outer covering of feathers Scales on walking legs Front limbs = wings 4 chambered heart Warm blooded (endotherm) Amniote eggs

Mammals Have mammary glands to nourish young Body hair 4 chambered hearts Warm blooded (endotherm) Grouped according to method of development

Groups of Mammals Egg laying mammals = montremes Duck-billed platypus & spiny anteaters

Marsupials : bear live young that complete development in pouch (marsupium) Kangaroos, koalas, & wombats

Placentals: named for placenta (structure formed when the embryos tissues join the tissues within the mothers body. Nutrients, gases, and waste are exchanged through the placenta Bats, bears, cows, humans and other primates, etc…..