List out the salient features of exo and endoskeleton's in reptiles.

Explanation

The exoskeleton of reptiles occurs in the form of horny epidermal scales, shields and claws.
Endoskeleton :
1. Skull is monocondylic and many have temporal fossae.
2. Each half of the lower jaws is formed by six bones.
3. Vertebrae are mostly procoelous.
4. The first two cervical vertebra are specialized into atlas and axis.
5. Vertebral column is distinguished into cervical, thoracic, lumbar, sacral and caudal regions.
6. Most living reptiles possess two sacral vertebrae.
7. Interclavical is associated with pectoral girdle.
8. Ribs are single headed expect in crocodilins.