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Cardiac shunting and blood flow distribution in the American alligator (ALLIGATOR MISSISSIPPIENSIS) Ostlin, Janice Christine
Abstract
The cardiac and circulatory anatomy of the American alligator (Alligator mississippiensis) is unique in that both the cardiac and systemic circulatory systems display anatomical divisions. This situation may also be of physiological significance to the animal. The purpose of this study was to determine regional blood flow distribution in the alligator, with respect to cardiac blood flow patterns. Animals were instrumented with flow and pressure recorders, and monitored over extended time periods. Fluorescent microspheres capable of being entrapped in tissue capillary beds were introduced into both the right and left aortas under various conditions. Blood flow distribution to tissues during the presence or absence of a pulmonary to systemic (P->S shunt) was of primary interest. Tissue samples depicted a significant separation in the perfusion patterns of the right and left aortas. The right aorta primarily perfused the brain and liver, and to a lesser extent, the digestive system organs. The left aorta perfused the digestive tract organs, including the spleen. Dissection of the circulatory paths of the right and left aortas determined this anatomical division. Possible differences in the left aortic distribution of right ventricular (shunted) blood as compared to left ventricular (not shunted) blood were noted.
Item Metadata
Title |
Cardiac shunting and blood flow distribution in the American alligator (ALLIGATOR MISSISSIPPIENSIS)
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
1997
|
Description |
The cardiac and circulatory anatomy of the American alligator (Alligator
mississippiensis) is unique in that both the cardiac and systemic circulatory systems
display anatomical divisions. This situation may also be of physiological significance to
the animal. The purpose of this study was to determine regional blood flow distribution in
the alligator, with respect to cardiac blood flow patterns.
Animals were instrumented with flow and pressure recorders, and monitored over
extended time periods. Fluorescent microspheres capable of being entrapped in tissue
capillary beds were introduced into both the right and left aortas under various conditions.
Blood flow distribution to tissues during the presence or absence of a pulmonary to
systemic (P->S shunt) was of primary interest.
Tissue samples depicted a significant separation in the perfusion patterns of the
right and left aortas. The right aorta primarily perfused the brain and liver, and to a lesser
extent, the digestive system organs. The left aorta perfused the digestive tract organs,
including the spleen. Dissection of the circulatory paths of the right and left aortas
determined this anatomical division. Possible differences in the left aortic distribution of
right ventricular (shunted) blood as compared to left ventricular (not shunted) blood were
noted.
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Extent |
3675454 bytes
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Genre | |
Type | |
File Format |
application/pdf
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Language |
eng
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Date Available |
2009-03-25
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Provider |
Vancouver : University of British Columbia Library
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Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
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DOI |
10.14288/1.0088279
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Graduation Date |
1997-11
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Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.