Mention the function of the following:
Body wall in earthworm

(N/A) The body wall of an earthworm is primarily composed of an outer cuticle,epidermis,two muscle layers (circular and longitudinal),and an inner coelomic epithelium.
Its primary functions are:
$1$. Protection: It protects the internal organs from mechanical injury and desiccation.
$2$. Locomotion: The contraction and relaxation of the circular and longitudinal muscles facilitate movement and burrowing in the soil.
$3$. Respiration: The moist body wall allows for cutaneous respiration,where gaseous exchange occurs directly through the skin.