Shedding the old exo- and epicuticle

The emergence of an adult insect from its pupal case, or the hatching of an insect larva from an egg. From the French eclosion, from eclore, to open.

In embryonic development, the germ layer giving rise to the epidermis, exocrine glands, brain and nervous system, sense organs, foregut and hindgut, respiratory system, and external genitalia.

Larval body type often called wireworms. Long, smooth, and cylindrical body with hard exoskeleton and very short thoracic legs. Example: Click beetle, flour beetle

Secretory structures adapted for producing hormones and releasing them into the circulatory system

A group of hormone-secreting structures that help maintain homeostasis, coordinate behavior, and regulate growth, development, and other physiological activities

In embryonic development, the germ layer giving rise to the midgut.

The epicuticle is the outermost part of the cuticle. Its function is to reduce water loss and block the invasion of foreign matter.

The epiproct is the last dorsal sclerite at the tip of the abdomen. It covers and protects the anus from above.

The epistomal suture runs along the ventral side of the frons. It separates the frons from the clypeus

Larval body type often called caterpillars. Cylindrical body with short thoracic legs and 2-10 pairs of fleshy abdominal prolegs. Example: Moths and butterflies

Pupal body type. All developing appendages are free and visible externally. Example: Beetles and lacewings