What is the difference between a carapace and plastron?

The carapace and plastron are two distinct parts of a turtle's shell. The carapace is the upper, dome-shaped section that covers the turtle's back, while the plastron is the flatter, protective plate on the underside of the turtle. Together, these structures form the complete shell, providing protection and support for the animal. The carapace is usually more prominent and often features various patterns and colors, while the plastron can vary in shape and size among different turtle species.