Birds+and+Reptiles

__ Birds and Reptiles __ OBJECTIVES 1. Know how to explain how reptile adaptations make them suited for life on land. 2. Compare the characteristics of different groups of reptiles. __ Vocabulary __ · Embryo – the earliest stage of growth and development of both plants and animals. · Amniotic egg – provides nourishment to the embryo and contains membranes that protect it while it develops in a terrestrial environment. · Jacobson’s organ – A place at the top of a snake’s mouth where special cells identify molecules in the air. · Amnion – a membrane filled with fluid that surrounds the developing embryo. · Shell – a leathery shell that encases the reptile egg. · Yolk – the main food supply for the embryo enclosed in a stack and often attached to the embryo. · Egg tooth- a horny tooth attached to the snout of a reptile that helps it hatch from the egg. · Chorion – a membrane that forms around the yolk, allantois, amnion, and embryo. · Allantois – allows gas exchange for respiration. · Feather – a lightweight modified protein scale that provides insulation and enables flight. · Sternum – a large breastbone. · Endotherm – an animal that maintains a nearly constant body temperature that is not dependent on environmental temperature. · Incubate – process of keeping eggs laid outside the body warm. Also involves turning of the eggs to ensure proper development.

Outline
 * REPTILES **
 * 1) **** What is a reptile?  **
 * a) **** Reptiles have scaly skin. **
 * b) **** Reptiles reproduce on land. **
 * c) **** Skeletal changes in reptiles. **
 * d) **** Some reptiles have four chambered hearts. **
 * e) **** Reptiles are ectotherms. **
 * f) **** How reptiles obtain food. **
 * g) **** YOUR MOM is a reptile **
 * h) **** How reptiles use their sense organs. **
 * 2) **** Diversity of reptiles **
 * a) **** Turtles have shells **
 * b) **** Crocodiles include the largest living reptiles.  **
 * c) **** Snakes and lizards have diverse forms **
 * 3) **** Origins of reptiles **
 * BIRDS **
 * 1. **** What is a bird?  **
 * a. **** Birds have feathers **
 * b. **** Birds have wings **
 * c. **** Flight requires energy **
 * 2. **** Diversity of birds **
 * 3. **** Origins of birds **