Abstract
Blood vascular casts of the rat adrenal glands were observed with a scanning electron microscope. The cortical capillary plexus drains, through the corticomedullary venous radicles, into the subcortical veins continuous with the medullary collecting veins. The medullary capillary plexus drains into the corticomedullary venous radicles, subcortical veins and medullary collecting veins. No portal vessel was noted between the cortical and medullary capillaries. These findings indicate that the cortical blood rich in glucocorticoids preferentially and continuously flows into the cortimedullary venous radicles, subcortical veins and medullary collecting veins all three of which are fenestrated in type, and also suggest that the vascular route from the cortical capillaries to the medullary collecting veins functions as a substitute for the portal system, controlling the biosynthesis of catecholamines in the adrenal medulla. The vascular bed of the accessory adrenal gland (extra-adrenal cortical or chromaffin body) is sometimes annexed to that of the adrenal gland. On rare occasions, the vascular beds of the extra-adrenal cortical and chromaffin bodies fuse with each other. Additional scanning of tissue samples confirmed the direct drainage of cortical capillaries into the medullary veins and also the endothelial fenestrations of these capillaries and veins.
| Original language | English |
|---|---|
| Pages (from-to) | 461-476 |
| Number of pages | 16 |
| Journal | Archives of Histology and Cytology |
| Volume | 52 |
| Issue number | 5 |
| Publication status | Published - 1989 |
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ASJC Scopus subject areas
- Anatomy
- Histology
Cite this
Blood vascular beds of rat adrenal and accessory adrenal glands, with special reference to the corticomedullary portal system : A further scanning electron microscopic study of corrosion casts and tissue specimens. / Murakami, T.; Oukouchi, H.; Uno, Y.; Ohtsuka, Aiji; Taguchi, Takehito.
In: Archives of Histology and Cytology, Vol. 52, No. 5, 1989, p. 461-476.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Blood vascular beds of rat adrenal and accessory adrenal glands, with special reference to the corticomedullary portal system
T2 - A further scanning electron microscopic study of corrosion casts and tissue specimens
AU - Murakami, T.
AU - Oukouchi, H.
AU - Uno, Y.
AU - Ohtsuka, Aiji
AU - Taguchi, Takehito
PY - 1989
Y1 - 1989
N2 - Blood vascular casts of the rat adrenal glands were observed with a scanning electron microscope. The cortical capillary plexus drains, through the corticomedullary venous radicles, into the subcortical veins continuous with the medullary collecting veins. The medullary capillary plexus drains into the corticomedullary venous radicles, subcortical veins and medullary collecting veins. No portal vessel was noted between the cortical and medullary capillaries. These findings indicate that the cortical blood rich in glucocorticoids preferentially and continuously flows into the cortimedullary venous radicles, subcortical veins and medullary collecting veins all three of which are fenestrated in type, and also suggest that the vascular route from the cortical capillaries to the medullary collecting veins functions as a substitute for the portal system, controlling the biosynthesis of catecholamines in the adrenal medulla. The vascular bed of the accessory adrenal gland (extra-adrenal cortical or chromaffin body) is sometimes annexed to that of the adrenal gland. On rare occasions, the vascular beds of the extra-adrenal cortical and chromaffin bodies fuse with each other. Additional scanning of tissue samples confirmed the direct drainage of cortical capillaries into the medullary veins and also the endothelial fenestrations of these capillaries and veins.
AB - Blood vascular casts of the rat adrenal glands were observed with a scanning electron microscope. The cortical capillary plexus drains, through the corticomedullary venous radicles, into the subcortical veins continuous with the medullary collecting veins. The medullary capillary plexus drains into the corticomedullary venous radicles, subcortical veins and medullary collecting veins. No portal vessel was noted between the cortical and medullary capillaries. These findings indicate that the cortical blood rich in glucocorticoids preferentially and continuously flows into the cortimedullary venous radicles, subcortical veins and medullary collecting veins all three of which are fenestrated in type, and also suggest that the vascular route from the cortical capillaries to the medullary collecting veins functions as a substitute for the portal system, controlling the biosynthesis of catecholamines in the adrenal medulla. The vascular bed of the accessory adrenal gland (extra-adrenal cortical or chromaffin body) is sometimes annexed to that of the adrenal gland. On rare occasions, the vascular beds of the extra-adrenal cortical and chromaffin bodies fuse with each other. Additional scanning of tissue samples confirmed the direct drainage of cortical capillaries into the medullary veins and also the endothelial fenestrations of these capillaries and veins.
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UR - http://www.scopus.com/inward/citedby.url?scp=0024892362&partnerID=8YFLogxK
M3 - Article
C2 - 2631917
AN - SCOPUS:0024892362
VL - 52
SP - 461
EP - 476
JO - Archives of Histology and Cytology
JF - Archives of Histology and Cytology
SN - 0914-9465
IS - 5
ER -