Chapter 29

29.1 CLASS REPTILIA – pg. 852

“to creep”

• Includes snakes, turtles, tortoises, lizards, alligators, crocodiles, tuataras

• Dry, scaly skin• Claws

Gecko

CLASS REPTILIA• Gas exchange: lungs• Most have 3 chambered hearts• Ectothermic• Molting - shedding of the old skin

Diamondback Terrapins hatching

Hognose snakes hatching

•Internal fertilization / external development (most)

Galapagos Tortoises Diamondback Terrapin Tortoise

Loggerhead Turtle Hawksbill Turtle

Turtle or Tortoise?

CLASS REPTILIA• Jacobson’s organ - tastes the air

Only in Thailand!

29.2 Class Aves: pg. 861

includes all birds

CLASS AVES - “birds”

• All have feathers• Not all can fly

PeacocksPenguin

CLASS AVES• Four chambered heart• Endothermic

Pelicans

CLASS AVES• No teeth

CLASS AVES•Preening - feather maintenance•Molting - shedding of old feathers•Bones - thin & hollow

Less bone = less muscle

CLASS AVES• Internal fertilization /

external development• Incubation• Gas exchange– Air sacs & lungs

CLASS AVES• Variety of: – Legs– Feet– Wings– Eyes– Claws– Beaks

Pelicans

Birds evolved from the Theropod dinosaur