Japanese Journal of Veterinary Research;Volume 36, Number 1

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BLOOD SUPPLY AND MICROVASCULATURE OF THE LYMPH NODES IN PIGS

HOSHI, Nobuhiko;HASHIMOTO, Yoshiharu;KITAGAWA, Hiroshi;KON, Yasuhiro;KUDO, Norio

Permalink : http://hdl.handle.net/2115/3081
JaLCDOI : 10.14943/jjvr.36.1.15
KEYWORDS : arterial supply;lymph node;microvasculature;pig;scanning electron microscopy

Abstract

The blood supply and intranodal microvasculature in pig lymph nodes were studied by using a casting method and angiography. Arterial supply : In mandibular, subiliac, superficial inguinal and superficial popliteal lymph nodes, each nodular unit received nodal arteries mainly at the A-type hilus, and to some degree at the E-type hilus. The jejunal lymph nodes were supplied by numerous nodal arteries from networks of jejunal arteries. Each nodal artery running into the jejunal node was divided into 3 to 5 small branches. One of them penetrated into each nodular unit at the A-type hilus. The others usually branched extensively over the nodal surface, and were often distributed and wrapped around a part or all of the node. They then penetrated into the nodular units at many peripheral convex surfaces and at the A- or E-type hilus. Intranodal microcirculation of the jejunal lymph nodes : A nodal artery pene trated deeply into each nodular unit at the A-type hilus. Subsequently it was divided into many branches and ran into the trabecular trees. These smaller arteries became arterioles and capillaries in the cortex-like tissue (CT), and were distributed in the area of the CT and medulla-like tissue (MT). As the arteries entering via the E-type hilus branched into many smaller arteries within the MT, they extensively supplied the CT in the peripheral areas opposite the E-type hilus. The arteries entered from the peripheral convex surfaces supplied the CT, which occupied a conventional superficial position just underneath the capsule, and they formed capillary networks. Postcapillary venules (PCV) formed basket-like plexuses around germinal centers. These PCV converged into several large branches in the areas of the cortico-medullary junctions, and left the node through the A-, or E-type hilus.

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