The blood vascular bed of the human pancreas, with special reference to the insulo-acinar portal system. Scanning electron microscopy of corrosion casts

T. Murakami, T. Fujita, Takehito Taguchi, Y. Nonaka, K. Orita

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

Microdissection and scanning electron microscopy of corrosion casts showed the structures of the vascular bed of the human pancreas to consist mainly of the capillary plexuses of the exocrine lobules, extralobular ducts and endocrine islets. A considerable number of the exocrine lobules were found to contain one to four marked endocrine islets larger than 30 μm in diameter. These intralobular islets received one or more arterioles (afferent vessels) and emitted conspicuous insulo-acinar portal vessels which continued into the lobular capillaries, suggesting insular control over the functions of the exocrine acini of the pancreas. Direct drainage of the intralobular islets into the veins was never reproduced. Not excluding the possibility that some lobules might contain smaller, unidentifiable islets, there nonetheless were many lobules which directly received arterioles. These lobules are free of control by an islet. Rarely, an islet was located in the interlobular tissue space or along an extralobular duct. Such an extralobular islet issued no portal vessels, and drained into the interlobular or periductal veins. The surface of this type of islet comprised a thin network of fine capillaries. A possibility was suggested that this cortical network might be homologous with the lobular capillaries. No portal route was observed between the islets and extralobular ducts. Few connections were noted between the capillary plexuses of the lobules and ducts.

Original languageEnglish
Pages (from-to)381-395
Number of pages15
JournalArchives of Histology and Cytology
Volume55
Issue number4
Publication statusPublished - 1992

Fingerprint

Portal System
Corrosion
Electron Scanning Microscopy
Blood Vessels
Pancreas
Arterioles
Veins
Exocrine Pancreas
Microdissection
Drainage

ASJC Scopus subject areas

  • Anatomy
  • Histology

Cite this

The blood vascular bed of the human pancreas, with special reference to the insulo-acinar portal system. Scanning electron microscopy of corrosion casts. / Murakami, T.; Fujita, T.; Taguchi, Takehito; Nonaka, Y.; Orita, K.

In: Archives of Histology and Cytology, Vol. 55, No. 4, 1992, p. 381-395.

Research output: Contribution to journalArticle

@article{365809eacd8b43179a40f0569d572817,
title = "The blood vascular bed of the human pancreas, with special reference to the insulo-acinar portal system. Scanning electron microscopy of corrosion casts",
abstract = "Microdissection and scanning electron microscopy of corrosion casts showed the structures of the vascular bed of the human pancreas to consist mainly of the capillary plexuses of the exocrine lobules, extralobular ducts and endocrine islets. A considerable number of the exocrine lobules were found to contain one to four marked endocrine islets larger than 30 μm in diameter. These intralobular islets received one or more arterioles (afferent vessels) and emitted conspicuous insulo-acinar portal vessels which continued into the lobular capillaries, suggesting insular control over the functions of the exocrine acini of the pancreas. Direct drainage of the intralobular islets into the veins was never reproduced. Not excluding the possibility that some lobules might contain smaller, unidentifiable islets, there nonetheless were many lobules which directly received arterioles. These lobules are free of control by an islet. Rarely, an islet was located in the interlobular tissue space or along an extralobular duct. Such an extralobular islet issued no portal vessels, and drained into the interlobular or periductal veins. The surface of this type of islet comprised a thin network of fine capillaries. A possibility was suggested that this cortical network might be homologous with the lobular capillaries. No portal route was observed between the islets and extralobular ducts. Few connections were noted between the capillary plexuses of the lobules and ducts.",
author = "T. Murakami and T. Fujita and Takehito Taguchi and Y. Nonaka and K. Orita",
year = "1992",
language = "English",
volume = "55",
pages = "381--395",
journal = "Archives of Histology and Cytology",
issn = "0914-9465",
publisher = "Japan Society of Histological Documentation",
number = "4",

}

TY - JOUR

T1 - The blood vascular bed of the human pancreas, with special reference to the insulo-acinar portal system. Scanning electron microscopy of corrosion casts

AU - Murakami, T.

AU - Fujita, T.

AU - Taguchi, Takehito

AU - Nonaka, Y.

AU - Orita, K.

PY - 1992

Y1 - 1992

N2 - Microdissection and scanning electron microscopy of corrosion casts showed the structures of the vascular bed of the human pancreas to consist mainly of the capillary plexuses of the exocrine lobules, extralobular ducts and endocrine islets. A considerable number of the exocrine lobules were found to contain one to four marked endocrine islets larger than 30 μm in diameter. These intralobular islets received one or more arterioles (afferent vessels) and emitted conspicuous insulo-acinar portal vessels which continued into the lobular capillaries, suggesting insular control over the functions of the exocrine acini of the pancreas. Direct drainage of the intralobular islets into the veins was never reproduced. Not excluding the possibility that some lobules might contain smaller, unidentifiable islets, there nonetheless were many lobules which directly received arterioles. These lobules are free of control by an islet. Rarely, an islet was located in the interlobular tissue space or along an extralobular duct. Such an extralobular islet issued no portal vessels, and drained into the interlobular or periductal veins. The surface of this type of islet comprised a thin network of fine capillaries. A possibility was suggested that this cortical network might be homologous with the lobular capillaries. No portal route was observed between the islets and extralobular ducts. Few connections were noted between the capillary plexuses of the lobules and ducts.

AB - Microdissection and scanning electron microscopy of corrosion casts showed the structures of the vascular bed of the human pancreas to consist mainly of the capillary plexuses of the exocrine lobules, extralobular ducts and endocrine islets. A considerable number of the exocrine lobules were found to contain one to four marked endocrine islets larger than 30 μm in diameter. These intralobular islets received one or more arterioles (afferent vessels) and emitted conspicuous insulo-acinar portal vessels which continued into the lobular capillaries, suggesting insular control over the functions of the exocrine acini of the pancreas. Direct drainage of the intralobular islets into the veins was never reproduced. Not excluding the possibility that some lobules might contain smaller, unidentifiable islets, there nonetheless were many lobules which directly received arterioles. These lobules are free of control by an islet. Rarely, an islet was located in the interlobular tissue space or along an extralobular duct. Such an extralobular islet issued no portal vessels, and drained into the interlobular or periductal veins. The surface of this type of islet comprised a thin network of fine capillaries. A possibility was suggested that this cortical network might be homologous with the lobular capillaries. No portal route was observed between the islets and extralobular ducts. Few connections were noted between the capillary plexuses of the lobules and ducts.

UR - http://www.scopus.com/inward/record.url?scp=0027092711&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0027092711&partnerID=8YFLogxK

M3 - Article

C2 - 1482603

AN - SCOPUS:0027092711

VL - 55

SP - 381

EP - 395

JO - Archives of Histology and Cytology

JF - Archives of Histology and Cytology

SN - 0914-9465

IS - 4

ER -