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A lesson about the most important characteristics of the common earthworm.
Author: Horváthné Kunstár Andrea, Jámbor Gyuláné
earthworm, , Ringed worm, peristaltic locomotion, dermomuscular tube, saddle, hermaphrodite, soil, composting, Compost, garden, mating, anus, fertilisation, magnifier, biology, nature study, ecology, zoology, agriculture
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