1. Objective: Class Reptilia4

2. Important Terms Body Heat Ecotherms Endotherms
Environmental heat is main source of body heat
“cold blooded”
Reptiles, amphibians
Endotherms
Cell metabolism is main source of body heat
Mammals, birds

3. Class Reptilia Turtles, snakes, lizards, crocs, gators - Amniotic egg
Waterproof with shell
(Reptiles, birds, mammals)
CHARACTERISTICS:
Skin made of keratin
Have scales

4. Characteristics Lay eggs Lungs to breathe Molt Internal fertilization
External development
Lungs to breathe
Molt
Scales do not grow

5. Turtles
Order Testudines
Shell
protection
Jaw
No teeth

6. Lizards and Snakes Order Squamata Lizards Snakes tail, scaly skin
Warm environments
Snakes
Warm environments
Some are venomous

7. Crocodiles and Alligators
Order Crocodilia
4-chambered heart
Highly developed brain
Complex social behavior

8. Differences between Crocs and Alligators

9. Class Aves Wings Respiration Bones
Shaped to provide lift
Feathers: modified scales
Insulation and flight
Respiration
Lungs that support high level of oxygen
Bones
Hollow
Absent organs for reduced weight (1 ovary, toothless, no bladder)

10. Anatomy gizzard: grinds food crop: organ to store food temporarily
4-chambered heart
Separate ventricles
Efficient

11. Behavior Proportion of brain to body is second largest
Care for offspring
Territoriality