Objective: Class Reptilia 4

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

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

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

Turtles Order Testudines Shell protection Jaw No teeth

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

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

Differences between Crocs and Alligators

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)

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

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