title: The annual pattern of plasma calcium in the frog and the seasonal effect of ultimobranchialectomy and parathyroidectomy.
mesh_terms: D000818:Animals; D001001:Anura; D002118:Calcium / Q000097:blood*; D008297:Male; D010280:Parathyroid Glands / Q000378:metabolism*; D011894:Rana pipiens / Q000378:metabolism*; D012621:Seasons; D014460:Ultimobranchial Body / Q000378:metabolism*
chemical_list: D002118:Calcium