exuvia

In zoology, exuviae refers to the sloughed-off natural coverings of an animal. This process is known as exuviation or molting.12

Arthropods, such as insects and crustaceans, possess a rigid exoskeleton made of chitin and protein. This exoskeleton provides support, protection, and aids in locomotion. However, it does not grow with the animal. To overcome this, arthropods periodically shed their old exoskeleton in a process called molting or ecdysis.34

During molting, enzymes digest the inner layers of the old exoskeleton, and a new one is secreted beneath it. The animal then pulls out of the old skeleton, which splits along predetermined lines. The new exoskeleton is initially soft and flexible, hardening over time. This process allows arthropods to grow and is essential for their survival.34