15Z. 



FETAL TISSUES 



Values presented in these tables should be considered representative, but not exact, as rarely are enough data 

 presented to justify statistical treatment, and rarely is independent confirmatory information available. Unless 

 otherwise specified, values are for a single, intact embryo. 



Part I: SHEEP 

 Based on blood- flow and blood- gas analysis. 



/I/ The author believes this value too high, but cannot define the source of error. 



Contributor : Fitzgerald, L. R. 



Reference : Barcroft, J., "Researches on Prenatal Life, " Springfield, 111.: Charles C. Thomas, 1947. 



Part II: RAT 



In Lines 1-10, values are based on Cartesian Diver technique; w 

 11-44 are based on Warburg manometric technique. Medium: A 

 0.025 M bicarbonate buffer + 0.2% glucose; C = serum + 0.025 M 

 solution; E = Ringer-phosphate, pH 7.4. 



ith the exception of Lines 37 and 39, values in Lines 

 = 0.8% NaCl, phosphate buffer, pH 7.4; B = serum + 

 bicarbonate buffer + 0.011 M glucose; D = Krebs 



/I/ O2 = cu mm O2 consumed per mg dry weight tissue per hr. /2/ Q = cu mm lactic acid formed in O2 per rag 



dry weight tissue per hr. /3/ Q„' = cu mm lactic acid formed in N^ per mg dry weight tissue per hr. /4/ QS = cu 



mm acid {carbonic + lactic) formed per mg dry weight tissue per hr. /5/ Membranes intact. /6/ Membranes 

 destroyed. 



299 



