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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
01/08/1992 |
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Data da última atualização: |
01/12/2023 |
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Autoria: |
WAITES, G. M. H.; MOULE, G. R. |
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Título: |
Relation of vascular heat exchange to temperature regulation in the testis of the ram. |
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Ano de publicação: |
1961 |
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Fonte/Imprenta: |
Journal Reproduction Fertility, v. 2, p. 213-224, 1961. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: The blood flowing through the internal spermatic artery of the ram has been shown to cool by 5-2°C (range 4-5° to 5-8°C) between the aorta and the dorsal pole of the testis when testicular temperatures are 33-3° to 34-7°C. Most of the cooling occurs in the coiled portion of the artery in the spermatic cord where the venous blood returning from the testis through the pampiniform plexus warms by a similar amount. It is concluded that the vascular arrangement in the spermatic cord ofthe ram is a remarkably efficient heat-exchange system. The temperature deep in the testis remained close to that ofthe inside of the scrotal skin throughout controlled variations in the range 28° to 40°C. Changes in the temperature of the scrotum are quickly transferred to the blood in the superficial veins ofthe testis which then, by heat exchange in the spermatic cord, alters the temperature of the testicular arterial inflow. It is concluded that the vascular mechanism is not by itself regulatory but it rapidly transfers any benefit of scrotal thermorégulation to all parts ofthe testis. |
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Palavras-Chave: |
Andrologia. |
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Thesagro: |
Carneiro; Fisiologia; Ovino; Reprodução; Testículo. |
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Thesaurus Nal: |
Males; Rams; Reproduction; Sheep. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01770naa a2200253 a 4500
001 1521983
005 2023-12-01
008 1961 bl uuuu u00u1 u #d
100 1 $aWAITES, G. M. H.
245 $aRelation of vascular heat exchange to temperature regulation in the testis of the ram.$h[electronic resource]
260 $c1961
520 $aAbstract: The blood flowing through the internal spermatic artery of the ram has been shown to cool by 5-2°C (range 4-5° to 5-8°C) between the aorta and the dorsal pole of the testis when testicular temperatures are 33-3° to 34-7°C. Most of the cooling occurs in the coiled portion of the artery in the spermatic cord where the venous blood returning from the testis through the pampiniform plexus warms by a similar amount. It is concluded that the vascular arrangement in the spermatic cord ofthe ram is a remarkably efficient heat-exchange system. The temperature deep in the testis remained close to that ofthe inside of the scrotal skin throughout controlled variations in the range 28° to 40°C. Changes in the temperature of the scrotum are quickly transferred to the blood in the superficial veins ofthe testis which then, by heat exchange in the spermatic cord, alters the temperature of the testicular arterial inflow. It is concluded that the vascular mechanism is not by itself regulatory but it rapidly transfers any benefit of scrotal thermorégulation to all parts ofthe testis.
650 $aMales
650 $aRams
650 $aReproduction
650 $aSheep
650 $aCarneiro
650 $aFisiologia
650 $aOvino
650 $aReprodução
650 $aTestículo
653 $aAndrologia
700 1 $aMOULE, G. R.
773 $tJournal Reproduction Fertility$gv. 2, p. 213-224, 1961.
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
