Moist cuticle helps with respiration in which of the following invertebrates?
Earthworms use their moist cuticle for respiration.
Arthropoda - Tracheal, gills, book lungs, book gills
Amphibia (Vertebrate) - Moist skin, buccal cavity, lungs and gills
Platyhelminthes - Entire body surface (no specific respiratory structure)