英语词汇“marginal sinus”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	marginal sinus
释义	DictionarySeesinus marginal sinus marginal sinus [′mär·jən·əl ′sī·nəs] (anatomy) One of the small, bilateral sinuses of the dura mater which skirt the edge of the foramen magnum, usually uniting posteriorly to form the occipital sinus. terminal sinus (embryology) An enlarged venous sinus incompletely encircling the margin of the placenta. marginal sinus marginal sinus 1. Considered together, the many dilated veins or venous "lakes" that collect blood in the intervillous space of the placenta; the marginal sinus drains into the uterine veins.2. A dural sinus along the inside of the rim of the foramen magnum; it drains into the vertebral venous plexus.3. A blood-filled sinus in the marginal zone of the spleen. In the passage from the red pulp to the white pulp, some arterial blood flows along (and percolates through) the endothelia-lined walls of the marginal sinus before entering the arterial capillary beds of the white pulp.See also: sinus
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