Length:
2:24
Arthropods’ exoskeleton must be shed or molted when they grow. This sequence shows how a blue crab must pull its legs and body out of the old shell.
Arthropods’ exoskeleton must be shed or molted when they grow. This sequence shows how a blue crab must pull its legs and body out of the old shell.
Arthropods must shed their rigid exoskeleton in order to grow. A new soft exoskeleton expands before it hardens so the animal within has room to grow.