Detailed anatomical diagram of a giant Australian earthworm, illustrating its internal structures and digestive, circulatory, and nervous systems.
Diagram of a giant Australian earthworm showing internal anatomy including the cuticle, epidermis, coelom, circular and longitudinal muscles, dorsal and ventral vessels, nephrostomes, nerve cords, pharynx, esophagus, crop, gizzard, intestine, and metanephridia. A person holds a live earthworm for scale.