| interzonal mesenchyme | An area of avascular mesenchyme between adjacent skeletal elements in the embryo; it denotes the region of future joints. (05 Mar 2000) |
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| mesenchyme | <pathology> Embryonic tissue of mesodermal origin. (18 Nov 1997) |
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| synovial mesenchyme | Vascular mesenchyme surrounding the interzonal mesenchyme; it develops into the synovial membrane of a joint. (05 Mar 2000) |