The clitelum, or clitellum, is a thickened, glandular region found in certain annelids, particularly earthworms. It plays a crucial role in reproduction by secreting a mucus ring that facilitates the formation of a cocoon for the fertilized eggs. The clitellum is typically visible as a swollen band around the body of the worm and is most prominent during the breeding season.
Inside
A clitellum is a reproductive structure found in earthworms and some other annelid worms. It is a raised band or saddle-like structure near the head end of the worm's body that secretes a mucous cocoon for holding eggs and sperm during reproduction.
It holds the male and female reproductive organs.