Description: Dark grey: Foot and mantle. Light grey: Head and inner body. Black: Shell. Organ systems: Dark red: Circulation. Green: Digestion. Yellow: Nervous system. Orange: Excretion. Violet: Gonad (ge- nital organ). Special: Light red: Heart bag (pericard). Dark green: Radula. 1: Heart, 2: Gill. Source: Livingstone, Biodidac, further editing: [RN]. |