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Direct measurement of allantoic blood flow in the chicken, Gallus domesticus. Responses to alteration in ambient temperature and PO2



Direct measurement of allantoic blood flow in the chicken, Gallus domesticus. Responses to alteration in ambient temperature and PO2



Comparative Biochemistry and Physiology. A, Comparative Physiology 81(3): 641-642



A technique is described for direct measurement of allantoic blood flow in chicken embryos in situ using an electromagnetic flow meter. A branch of the allantoic artery was catheterized non-obstructively for simultaneous pressure measurement. In 15-day-old embryos at 39 degrees C the mean heart rate was 278 beats/min falling to 124 beats/min at 26 degrees C. Despite this fall in heart rate, blood flow fell only 10% from 4.4 ml/min at 39 degrees C to 4.0 ml/min at 26 degrees C. Mean allantoic blood pressure was similarly nearly unaffected by temperature. Allantoic blood flow was insignificantly altered by hyperoxic as well as hypoxic exposure (6% O2).

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Accession: 015516714

Download citation: RISBibTeXText

PMID: 2863053

DOI: 10.1016/0300-9629(85)91040-0



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