The clitellum is a part of the earthworm's reproductive system. It is the part of the worm that makes the egg cocoon.
The covering of a silkworm cocoon is called a silk filament or silk thread. It is made up of a protein called fibroin, which is secreted by the silkworm to form the cocoon.
externally
mucous which is secreted from mucous membrane
How the heck should I know thats why I looked it Up!
ANSWERAnimals digest their food. The proteins carbohydrates and fat in food. are broken down into simple molecules.
The clitellum of an earthworm is a series of segments that are swollen on the anterior side of the worm.
A cocoon that produces a live silk moth is the result of the silk-producing process of silkworms, specifically the larvae of the Bombyx mori moth. These cocoon structures are spun by the larvae to protect themselves during their pupal stage as they undergo metamorphosis. The silk fibers are made from proteins secreted by the silkworm, and when the adult moth emerges, it breaks free from the cocoon, allowing for the continuation of the species. In silk production, however, many cocoons are harvested before the moth emerges, as this yields the silk fibers commercially.
Cocoon
A cocoon is a head like yours .... a sentence is i have a cocoon head
A clitellum is part of a earthworm and leeches. The purpose of it is to secrete a sac where they deposit their eggs.
The clitellum is a raised area located near the front of the body on a segmented earthworm. It is a glandular, thickened section of the body wall that secretes a cocoon for egg deposition during reproduction.