(1) In spite of the fact that veinlet and cubitus interruptus affect closely related developmental processes, the ci isoalleles had no effect upon the expression of veinlet.
(2) Polygenic modifiers affecting the expression of the mutant veinlet were studied to determine whether each acts specifically upon one vein or wing region or whether they affect the venation pattern in some general way.
(3) In order to test the assumption that isoalleles can contribute to polygenic variation, several isoalleles of cubitus interruptus were examined for their influence upon the quantitative expression of a related venation mutant, veinlet.
(4) The hydraulic conditions are described, and attention is drawn to the microvasculartissue consequences of the stasis, the degree of constraint exercised by the interstitial tissue, and the role played by the intricate "micro fiber" network of the microcirculation: only a part of the capillaries reconnect with the veinlet of the same circulatory unit, the others having to flow toward the veinlet of other units and only one initial lymphatic vein contributing to the evacuation of 3 to 4 veinlets.
(5) These results support the hypothesis that the polygenic modifiers affecting veinlet expression function independently of the veinlet locus, presumably by influencing common steps in the developmental processes leading to the formation of individual veins.
(6) The calf's reticulum, network of veinlets reinforced with arches, is a group of intersaphenous anastomosis.
Venule
Definition:
(n.) A small vein; a veinlet; specifically (Zool.), one of the small branches of the veins of the wings in insects.
Example Sentences:
(1) Electronmicroscopical investigations have revealed that, under normal conditions, a minor vesicular transfer of intravenously injected peroxidase occurs across the endothelium in segments of arterioles, capillaries and venules, especially in arterioles with a diameter about 15-30 mu.
(2) Normally, the small longitudinal (arterioles to venules) gradient of microvascular and perimicrovascular pressures is not a major concern, but in nonuniform disease processes, such as microembolism, longitudinal inhomogeneity, and parallel inhomogeneity are dominant.
(3) Neither the first- (A1) or second-order arterioles (A2) nor the first- (V1) or second-order venules (V2) constricted significantly to angiotensin II.
(4) The criteria selected by a classification tree method were similar: palpable purpura, age less than or equal to 20 years at disease onset, biopsy showing granulocytes around arterioles or venules, and gastrointestinal bleeding.
(5) The ciliary process vasculature consists of three different vascular territories with discrete arterioles and venules.
(6) The post-capillary-venules (PVC) are very permeable to both HRP and RR.
(7) In hypertension, all the components are affected in the microcirculatory bed of serous membranes: arterioles, precapillaries, capillaries, postcapillaries, venules, lymph capillaries and postcapillaries.
(8) Ballooning of venules is a frequent finding, possibly accounting for breakthrough bleeding.
(9) The difference between pressure in these venules and large vein pressure fell in proportion to the reduction in blood pressure and blood flow.
(10) The well developed long loops received their proper afferent arterioles from the arterial terminals in the primary plexus, and emitted their proper efferent venules continuous with the long portal vessels.
(11) The initial step in this process is the binding of lymphocytes to high endothelial venules (HEV), and in the case of trafficking of cells to the PLN, it is required that they bear the L-selectin surface receptor.
(12) IgG immunoglobulin was demonstrated in the wall of the post-capillary venules of human para-aortal lymph nodes by using a direct immunoperoxidase technique.
(13) Capillaries and small arterioles or venules, ranging from 8-50 microns in diameter, showed perikarya and dendrites abutting the basement membrane without evidence of glial interposition.
(14) During this stage, there was little ultrastructural distinction between CAM arterioles, capillaries, and venules.
(15) The occlusion of the veins and venules by the thin-walled vessels, and the reactive intimal fibrosis they provoke, leads to pulmonary capillary dilatation, collections of intra-alveolar siderophages, fibrosis of alveolar walls and osseous nodules.
(16) Into certain venules there appeared to be little or no renin secretion, into others a marked renin secretion, suggesting a heterogeneity of renin secretion by the different nephrons.
(17) The variables studied were leukocyte adhesion in postcapillary venules, macromolecular permeability as leakage of fluorescent dextran, and emigration of PMNs.
(18) The pulp cavity is reduced in size with age (maturation stage), in which the characteristic three vascular layers are changed into a one-layer coarse terminal capillary network which converges directly with the main venules.
(19) They had no germinal centers, surrounding lymphatics or high endothelial venules (HEV).
(20) In contrast, PAF causes platelet aggregation and chymase may cause arteriolar vasoconstriction (decreasing the volume of plasma reaching venules) by generation of angiotensin II.