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an elongated venous channel, 12-40 mcm wide, lined by rod-shaped cells.
Synonym(s): sinus lienis
splen·ic si·nus(splen'ik sī'nŭs)
An elongated venous channel, 12-40 mcm wide, lined by rod-shaped cells.
Any of the vascular collecting channels that lead into the internal veins of the spleen. The microcirculation in the spleen is quite leaky. Some capillaries empty directly into the splenic sinuses, but others allow blood to percolate through the extracellular red pulp before it drains into the splenic sinuses and thence into the veins.