1. The Bombyx mori is one member of the holometabolous class of insects, which possesses four distinguished developmental stages, i. e. , egg, larva, pupa, and adult.

2. This study provided theoretical basis for the holometabolous insect muscle transformation as a convenient model to understand vertebrate muscle regeneration.

3. Metamorphosis of an insect may be ametabolous hemimetabolous, or holometabolous. Neuroendocrine and endocrine secretions control metamorphosis.

4. There are about 750,000 species of named insects and 85 % of these are holometabolous.

5. Molting and metamorphosis are the typical developmental characters in holometabolous insects.