## Abstract In the chicken embryo, pulmonary ventilation and pulmonary gas exchange begin approximately one day before the completion of hatching. We asked to what extent the posture inside the egg, and the presence of the eggshell and membranes, may alter the mechanical behaviour of the respirator
β¦ LIBER β¦
On the mechanism of shell mineral solubilization by the chick embryo
β Scribed by Roberto Narbaitz
- Publisher
- Springer
- Year
- 1974
- Tongue
- English
- Weight
- 702 KB
- Volume
- 16
- Category
- Article
- ISSN
- 1432-0827
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## T W O FIGURES Previous observations on the nitrogenous excreta of the chick, summarized by Needham ('31) showed a peak of ammonia production at 4 days, of urea at 9 days and of uric acid at 11 days. Total nitrogen excreted was reported as 11.124 mg. of which uric acid constituted 91.35%, urea 7