The intrinsic vascularization of nonsynovial segment of the tendon is uni-formly distributed and consists mainly of the interfascicuar anastomotic vessels,which communi-cate with the transverse branches of epitendinous plexus.

• 肌腱鞘外段的腱内血管以束间吻合血管为主,分布均匀,与腱外膜血管丛的横支互相连接。 肌腱鞘内段的血管呈节段性分布于系膜侧,而对系膜侧为无血管区。