REPTILES

1
REPTILES

• FIRST SUCCESSFUL LAND ANIMALS

2
REPTILES

• EXAMPLES SNAKE, LIZARD, TURTLE, ALLIGATOR
• Habitat aquatic, semiaquatic, terrestrial
• Integument skin w/ scales of keratin, some with
  shell
• Appendages 4 legs w/ claws
• none
• flippers

3
REPTILES

• Bony endoskeleton w/ cartilage
• Limbs beneath the body
• Jaws w/ teeth, jaws w/ fangs, jaws w/ beak
• Carnivore diet
• Additional coiling of intestine w/ cloaca
• Lungs
• Closed circulation w/ 3 heart chambers, 4 in
  larger animals, partial septum

4
REPTILES

• Ectothermic body temp that is behaviorally
  controlled
• Excretion kidneys, urea and uric acid
  concentrated in paste form
• Brain w/ dorsal nerve cord, larger cerebrum and
  cerebellum
• 5 senses , hear through bones of jaw and skull,
  some have pits to detect heat

5
REPTILES

• Separate sexes w/ internal fertilization
• Cloaca
• Amniotic egg w/ leathery shell important to
  reproductive success on land
• Most oviparous, some ovoviviparous