Scanning electron microscopic observation of the vascular supply in the cock's adrenal gland

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  • 鶏の副腎に分布する血管の走査電顕的所見
  • ニワトリ ノ フクジン ニ ブンプスル ケッカン ノ ソウサ デンケンテキ シ

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Abstract

Blood vascular casts of the cock's adrenal gland were reproduced and observed with scanning electron microscope. Course and arrangement of these vessels described as follows. 1. The adrenal artery of the left side usually arised from the aorta descendence and in a few cases it originated from the cranial renal artery. The artery of the right adrenal gland came mainly from the cranial renal artery, whilst infrequently it originated as a small branch from the aorta descendence. Coursing toward the cranial area on the surface of the adrenal gland the adrenal artery repeated the branching and it became the small vessels (10-30/μm) to join the capillaries (about 5/μm) in the parenchyma of the gland. 2. The adrenal portal vein consisted of the tributaries which came from the subcutaneous tissues of the dorsal side of the flank, Musculus rhomboideus superficialis, caudal part of the M. latissimus dorsi, M. tensor propatagialis, Musculi intercostales externi, M.iliotrochantericus caudalis and M. iliotrochantericus cranialis and in the thorachoabdominal cavity it was drained by the vessels which came from Mm. levatores costarum, Venae vertebrales and Vena pectoralis caudalis. The surface of the gland was covered by the adrenal portal veins which branched and anastomosed each other. Almost all the capillaries of the parenchyma of the adrenal gland were drained by these branches. 3. The collecting veins of the gland were consisted of these tributaries which were drained by the capillaries in the parenchma. At the left adrenal gland, they joined the cranial and caudal adrenal veins which finally drained into the caudal vena cava, but the efferent veins of the right side opened directly into the caudal vena cava as 3 to 7 collecting veins.

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