On a peculiarity of planarian digestion.
D000818:Animals; D004064:Digestive System / Q000166:cytology; D004068:Digestive System Physiological Phenomena; D005247:Feeding Behavior; D007413:Intestinal Mucosa / Q000502:physiology; D008568:Memory; D009417:Nerve Tissue / Q000166:cytology / Q000502:physiology; D010986:Platyhelminths / Q000166:cytology / Q000502:physiology*; D013217:Starvation; D013997:Time Factors