what are Parabranchial ridges?
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These lateral constriction projects into its lumen as ridges called parabranchial ridges consisting of tall columnar cells. These ridges incompletely divide the pharynx in to a dorsal respiratory or branchial portion and a ventral digestive portion.
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These lateral constriction projects into its lumen as ridges called parabranchial ridges consisting of tall columnar cells. These ridges incompletely divide the pharynx in to a dorsal respiratory or branchial portion and a ventral digestive portion.
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