Chapter 31 - Reptiles

Kingdom Animalia
---Phylum Chordata
------Subphylum Vertebrata
---------Class Reptilia

Characteristics of Reptiles

1. Strong, bony skeletons and feet with claws
2. Ectothermic (cold-blooded)
3. Dry scaley skin
4. Amniote eggs
5. Respiration with lungs
6. Ventricle partially divided
7. Internal fertilization

The Amniote Egg

Contains a water and food supply for the developing embryo and can be layed on land.

Must be fertilized internally, has a shell

egg

Structure Function
amnion provides a watery environment for the embryo
yolk Sac contains the food for the embryo
allantois stores waste
chorion allows oxygen to enter and carbon dioxide to leave
albumin egg white

Oviparous - eggs are laid and incubated outside the body
Ovoviviparous - eggs are incubated inside the body, born live
Viviparous - live birth, no egg (humans)

Types of Reptiles

classification