title: Studies on the transition to ureotelism in the earthworm Lumbricus terrestris L.
mesh_terms: D000641:Ammonia / Q000378:metabolism*; D000818:Animals; D000845:Annelida / Q000378:metabolism*; D004702:Endocrine Glands / Q000033:anatomy & histology / Q000502:physiology; D009584:Nitrogen / Q000378:metabolism; D014508:Urea / Q000378:metabolism*
chemical_list: D000641:Ammonia; D014508:Urea; D009584:Nitrogen