Bundle sheath the ring of parenchymatous or sclerenchymatous tissue , usually one cell thick , that surrounds the vascular bundle in an angiosperm leaf 维管束鞘：在被子植物叶中，围绕维管束的通常是一层薄壁或厚壁细胞。
3.
Rays entirely parenchymatous , uni - serate ; horizontal and tangential walls of ray cells smooth and thin . cross - field pitting taxodoid with 1 - 4 pits 木射线单列，全由射线薄壁细胞组成；射线细胞水平壁薄，纹孔缺乏，端壁平滑。
4.
The aim of this study was to test whether therapeutic eswl induces changes in renal parenchymatous blood flow and to evaluate shock wave side effects on the renal parenchyma 本研究的目的在于测试体外震波碎石术是否会造成肾脏实质血流的改变，而间接指出震波碎石是否会对于肾脏实质造成副作用。
5.
7 - 10 days " seedlings after the seeds germinated , the meristem in the stem apex functioned to form true leaf primordium , meanwhile , the vessel elements which differentiated from parenchymatous cells of the middle and upper portion of the cnz connected with the vessel elements from procambium of epcotyl - shoot region 种子萌发7 - 10天，幼苗的茎端分生组织活动形成真叶雏形，此时由子叶节区中、上部薄壁细胞的转分化形成的导管分子与上胚轴-苗区原形层形成的导管分子发生连接。
