Reptiles

Reptiles

1. Skeletal changes in reptiles

   • The positioning of the legs provides greater body support and makes walking and running on land easier for most reptiles. They have a better chance  catching food and running away from other preys.

2. Reptiles reproduce on land

   • Reptiles don't have a larva stage so reptile young are not as vulnerable to water dwelling predators.

3. Reptiles have scaly skin

   • Reptiles don't have very moist skin instead they have dry thick skin covered wits scales. Scaly skin prevent he loss of body moisture and provides additional protection from predators.

4. Some have four-chambered hearts

   • Mot reptiles like amphibians have 3 chambered hearts. Some reptiles such as crocodilians have 4 chambered hearts that separate the supply of oxygen from blood with out oxygen . This separation allows oxygen to reach the body tissues. Its an adaptation that supports  the higher level of energy used is required by land animals.

5. Amniotic Egg

   • Egg Tooth
   • Amnion
   • Allantios
   • Chorion
   • Yolk
   • Shell

6. Reptiles are ectotherms

   • Reptiles are dependent on the heat from the environment. They love the warm heat and when it gets a little colder  they become dormant during this stage