title: Calcium metabolism in the laying hen. 4. The calcium status of the hen at night.
mesh_terms: D000818:Animals; D001683:Biological Clocks; D002118:Calcium / Q000032:analysis / Q000378:metabolism*; D002645:Chickens / Q000502:physiology*; D003624:Darkness; D004064:Digestive System / Q000378:metabolism*; D005260:Female; D007408:Intestinal Absorption; D010060:Ovulation; D013997:Time Factors
chemical_list: D002118:Calcium