The retention of  45 Ca by the chorio-allantoic sac of the chicken embryo.
D000818:Animals; D002118:Calcium / Q000008:administration & dosage / Q000032:analysis / Q000378:metabolism*; D002127:Calcium Isotopes; D002642:Chick Embryo / Q000378:metabolism*; D004707:Endoderm / Q000378:metabolism; D005321:Extraembryonic Membranes / Q000032:analysis / Q000378:metabolism*
D002127:Calcium Isotopes; D002118:Calcium