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Structure of Lymphatic Valves in the Spinotrapezius Muscle of the Rat

Structure of Lymphatic Valves in the Spinotrapezius Muscle of the Rat Lymphatic valves assure the forward propulsion of fluid along the lymphatic vessels. A description of valve function in skeletal muscle must be based on a knowledge of the valve morphology. To this end, histological sections of valves from lymphatic microvessels of the rat spinotrapezius muscle were examined with light microscopy. All of the approximately 50 valves studied from 20 rats had a bileaflet structure, with a buttress formed at each side of the valve by the fusion of opposing leaflets. This valve structure would allow the valve to close without inversion. There is no evidence for active smooth muscle action to open and close the valve. Since the Reynolds number of lymph flow is very small (about 0.0025), only pressure and viscous forces are available for valve closure. A particular mechanism based on the actual lymphatic valve structure is proposed. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Vascular Research Karger

Structure of Lymphatic Valves in the Spinotrapezius Muscle of the Rat

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Publisher
Karger
Copyright
© 1987 S. Karger AG, Basel
ISSN
1018-1172
eISSN
1423-0135
DOI
10.1159/000158707
Publisher site
See Article on Publisher Site

Abstract

Lymphatic valves assure the forward propulsion of fluid along the lymphatic vessels. A description of valve function in skeletal muscle must be based on a knowledge of the valve morphology. To this end, histological sections of valves from lymphatic microvessels of the rat spinotrapezius muscle were examined with light microscopy. All of the approximately 50 valves studied from 20 rats had a bileaflet structure, with a buttress formed at each side of the valve by the fusion of opposing leaflets. This valve structure would allow the valve to close without inversion. There is no evidence for active smooth muscle action to open and close the valve. Since the Reynolds number of lymph flow is very small (about 0.0025), only pressure and viscous forces are available for valve closure. A particular mechanism based on the actual lymphatic valve structure is proposed.

Journal

Journal of Vascular Research – Karger

Published: Jan 1, 1987

Keywords: Lymphatic valve; Skeletal muscle; Microcirculation

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