what is the pharynx used for in an earthworm
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what is the pharynx used for in an earthworm, pharynx of an earthworm, ts of pharynx of earthworm, function of pharynx in worms, pharynx in a worm, function of pharyngeal muscles in earthworm, pharynx function in flatworms, what is a pharynx flatworm, pharyngeal nephridia in earthworm, do roundworms have a pharynx