Calcium regulation by the chick embryo |
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| Authors: | Dr Roberto Narbaitz Leonard F Bélanger Barbara J Hunt |
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| Institution: | (1) Department of Histology and Embryology Faculty of Medicine, University of Ottawa, 275 Nicholas Street, K1N 6N5 Ottawa, Ontario, Ontario;(2) Department of Physiology Faculty of Medicine, University of Ottawa, 275 Nicholas Street, K1N 6N5 Ottawa, Ontario, Ontario |
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| Abstract: | An artificial air-chamber was produced in White Leghorn chick embryos on the eighth day of incubation. On day twenty, the concentration of calcium in blood and in yolk was found to be lower in the treated embryos than in controls but concentration in bone was similar in both groups. The histological and microradiographic aspect of bone was also similar in both experimental and control embryos. The decrease in the concentration of calcium in blood and in yolk indicates that the experimental procedure succeeded in producing a decrease in calcium intake by the embryo. The fact that bones remained unaffected tends to support the idea that in case of deficient supply of shell calcium, bones can withdraw the calcium they need from the yolk deposit. |
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| Keywords: | Calcium Chick Embryology Bone Yolk |
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