Carapace

Definition

A carapace is a hard, protective outer shell found in certain animal species, such as arthropods and reptiles. It provides structural support and defense against predators and environmental hazards.

5 Must Know Facts For Your Next Test

1. In arthropods like crustaceans, the carapace covers the cephalothorax and is made of chitin.
2. In reptiles like turtles, the carapace is part of the shell structure, formed by bony plates covered with keratinous scutes.
3. The carapace can vary in shape and size depending on the species and its habitat.
4. Molting in arthropods involves shedding the carapace to allow for growth.
5. The strength and durability of a reptile's carapace are critical for protection against predators.

Review Questions

• What biological materials primarily compose the carapace in arthropods and reptiles?
• How does the function of a carapace differ between crustaceans and turtles?
• Why is molting necessary for arthropods with a carapace?

Related terms

Exoskeleton: An external skeleton that supports and protects an animal's body in many invertebrates.

Molting:

The process by which an animal sheds its outer layer, such as skin or exoskeleton, to grow.

Scutes: Thickened horny or bony plates on a turtle's shell or other animals' bodies.