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单词 Bundle sheath
释义

Bundle sheath

英语例句库

Palisade tissue is rich in saliferous vacuoles, while vascular bundle sheath is obvious.

栅栏组织富含含盐液泡泡,维管束鞘明显。

The micrib belonging to bicollateral bundle is well developed.The bundle sheath is composed of idioblasts.

主脉发达,有异细胞组成的维管束鞘,具双生韧皮部。

中文百科

维管束 Vascular bundle

(重定向自Bundle sheath)
芹菜茎的横截面,可见维管束,其中包括韧皮部和木质部。

维管束是指维管植物(包括蕨类植物、裸子植物和被子植物)的维管组织,由木质部和韧皮部成束状排列形成的结构。维管束多存在于茎(草本植物和木本植物幼体)、叶(叶中的维管束又称为叶脉)等器官中。维管束相互连接构成维管系统主要作用是为植物体输导水分、无机盐和有机养料等,也有支持植物体的作用。

英语百科

Vascular bundle 维管束

(重定向自Bundle sheath)
Cross section of celery stalk, showing vascular bundles, which include both phloem and xylem
Detail of vascular bundle: closed, collateral vascular bundles of the stem axis of Zea mays
Vascular bundle in the leaf of Metasequoia glyptostroboides

Cross section of a leaf showing parts of a vascular bundle

A vascular bundle is a part of the transport system in vascular plants. The transport itself happens in vascular tissue, which exists in two forms: xylem and phloem. Both these tissues are present in a vascular bundle, which in addition will include supporting and protective tissues.

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更新时间:2025/6/21 18:00:04