Requirement for vitamin D for the active transport of calcium by the intestine.
D001693:Biological Transport, Active; D002118:Calcium / Q000378:metabolism*; D002136:Calcium, Dietary; D006801:Humans; D007421:Intestine, Small / Q000378:metabolism*; D007422:Intestines; D014807:Vitamin D / Q000378:metabolism*
D002136:Calcium, Dietary; D014807:Vitamin D; D002118:Calcium
CALCIUM/metabolism; INTESTINE, SMALL/metabolism; VITAMIN D/metabolism