I WONDER - Why Do Reptiles Have Scales?

Reptiles are easily identifiable by their scaly skin, which serves as protection against the sun and predators. These scales are composed of keratin, a protein also found in human hair and nails.

What are the main components of reptile skin?

How do scales protect reptiles from the sun?

In what way do scales serve as protection against predators?

What protein are reptile scales made from?

How is keratin used by humans?