title: Observations on the movements and structure of the bursa of Nippostrongylus brasiliensis and Nematospiroides dubius.
mesh_terms: D000723:Ancylostomatoidea / Q000502:physiology*; D000818:Animals; D008297:Male; D009068:Movement; D009559:Nippostrongylus / Q000502:physiology* / Q000648:ultrastructure; D051381:Rats; D014251:Trichostrongyloidea / Q000502:physiology* / Q000648:ultrastructure