Reptiles - Form, Function, and Taxonomy Print Friendly and PDF

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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


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



Resources Related to Reptiles

Animal Reproduction and the Amniote Egg  - color the amniote egg and identify the main structures; compare to human reproduction

Snake Detection Hypothesis (CER) - examine a possible evolutionary cause for fear of snakes