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venule
(redirected from venular)

   Also found in: Dictionary/thesaurus, Encyclopedia, Wikipedia 0.01 sec.
venule /ven·ule/ (ven´ūl) any of the small vessels that collect blood from the capillary plexuses and join to form veins.ven´ular
postcapillary venule  venous capillary.
stellate venules of kidney  stellate veins of kidney.
straight venules of kidney  venules that drain the papillary part of the kidney and empty into the arcuate veins.

ven·ule (vnyl, vn-)
n.
A small vein, especially one joining capillaries to larger veins. Also called capillary vein.

venu·lar (-y-lr) adj.

venule
[ven′yo̅o̅l]
Etymology: L, venula, small vein
any one of the small blood vessels that gather blood from the capillary plexuses and anastomose to form the veins. venular, adj.

venule [ven´ūl]
any of the small vessels that collect blood from the capillary plexuses and join to form veins. adj., adj ven´ular.

venule (ven´ūl),
n the smallest of the venous blood vessels; consists of an endothelial tube enclosed in a variable amount of elastic and collagenous tissue. Smooth muscle is introduced in the media as the caliber of the vessel increases. The muscle fibers are distributed sparsely in the smaller ves-sels but coalesce into circumferential bands in the larger vessels.

venule
any of the small vessels that collect blood from the capillary plexuses and join to form veins.


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In low albumin states, the decreased plasma oncotic pressure disturbs the equilibrium between plasma and interstitial fljuid with the result that there is a decrease in the movement of the interstitial fluid back into the blood at the venular end of the capillaries.
Microscopically, the lesions begin in the centrilobular zone, consist mainly of severe sinusoidal dilatation with congestion, and are occasionally associated with fibrotic venular occlusion or nodular regenerative hyperplasia.
Scattered focal necroses containing 10-20 karyopyknotic cells are localized mainly in superficial ("skin cap") layers of the tumour and surrounding blood venular vessels, and in some superficial areas there are focal haemorrhages (photo not shown).
 
 
 
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