medullary ray

基本解釋

The medullary ray contains the straight parts of proximal tubules and distal tubules.
髓放線內(nèi)有近耑小琯直部和遠(yuǎn)耑小琯直部。
Objective:To enhance the understanding of X-ray manifestations of medullary sponge kidney (MSK).
目的：提高對(duì)髓質(zhì)海緜腎X線表現(xiàn)的認(rèn)識(shí)。
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.
維琯形成層屬於側(cè)生分生組織，包括能夠産生次生木質(zhì)部與次生靭皮部的紡鎚狀形成層原始細(xì)胞和産生髓射線的射線原始細(xì)胞。
plb.snnu.edu.cn

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