Respiratory and Cardiovascular Responses in Internally Pipped Chicken Embryos

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Presentation for the 2007 University Scholars Day at the University of North Texas discussing research on respiratory and cardiovascular responses in internally pipped chicken embryos.

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14 p.

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Sbong, Stephanie & Dzialowski, Edward M. (Edward Michael) March 29, 2007.

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This presentation is part of the collection entitled: UNT Scholarly Works and was provided by UNT Honors College to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 239 times . More information about this presentation can be viewed below.

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  • Main Title: Respiratory and Cardiovascular Responses in Internally Pipped Chicken Embryos
  • Series Title: University Scholars Day

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Description

Presentation for the 2007 University Scholars Day at the University of North Texas discussing research on respiratory and cardiovascular responses in internally pipped chicken embryos.

Physical Description

14 p.

Notes

Abstract: During the internal pipping stage of hatching, oxygen exchange between the environment and developing embryo occurs at the chorioallantoic membrane (CAM) and lungs. At this point, oxygen uptake at the lungs (Vo2lung) accounts for 27% of the total oxygen uptake of the egg (Vo2total). The internally pipped embryo ventilates its lungs with hypoxic (12% O2) and hypercapnic (5% CO2) air. Employing dual gas exchangers at this stage should allow the internally pipped embryo to alter the lungs and CAM contribution to oxygen uptake. When exposed to hypoxia and hypercapnia, the externally pipped embryo alters gas exchange by increasing tidal volume. It is possible that the internally pipped embryo may have the ability to alter oxygen uptake at the lungs by changing ventilation patterns much like the externally pipped embryo. Prior to internal pipping, the embryo has patent ductus arteriosi and interatrial foramina that allow for a right-to-left shunt of blood flow away from the lungs and towards the CAM and systemic tissues. With the initiation of internal pipping, approximately 40% of blood flows through the pulmonary arteries to the lungs while 60% bypasses the lungs through these shunts. Reptiles are able to take advantage of their incompletely separated heart to adjust the right-to-left shunt of blood between the pulmonary and systemic circuit. Internally pipped embryos with their incompletely divided systemic and pulmonary circuits should be able to alter blood flow through the pulmonary arteries to the lungs and ductus arteriosi to the rest of the body as environmental conditions change.

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  • Fourth Annual University Scholars Day, 2007, Denton, Texas, United States

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UNT Scholarly Works

Materials from the UNT community's research, creative, and scholarly activities and UNT's Open Access Repository. Access to some items in this collection may be restricted.

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  • March 29, 2007

Added to The UNT Digital Library

  • July 2, 2012, 10:15 p.m.

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  • Nov. 21, 2017, 9:08 p.m.

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Sbong, Stephanie & Dzialowski, Edward M. (Edward Michael). Respiratory and Cardiovascular Responses in Internally Pipped Chicken Embryos, presentation, March 29, 2007; (digital.library.unt.edu/ark:/67531/metadc86923/: accessed November 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Honors College.