medullary ray

基本解釋

The medullary ray contains the straight parts of proximal tubules and distal tubules.
髓放線內(nèi)有近端小管直部和遠端小管直部。
Objective:To enhance the understanding of X-ray manifestations of medullary sponge kidney (MSK).
目的：提高對髓質(zhì)海綿腎X線表現(xiàn)的認識。
It is a lateral meristem and contains fusiform initials giving rise to secondary xylem and phloem and ray initials giving rise to medullary rays. See also secondary growth.
維管形成層屬于側(cè)生分生組織，包括能夠產(chǎn)生次生木質(zhì)部與次生韌皮部的紡錘狀形成層原始細胞和產(chǎn)生髓射線的射線原始細胞。
plb.snnu.edu.cn

any of the sheets of conducting tissue that run radially through the vascular tissue of some higher plants