xylem中文什么意思

n.
【植物；植物学】木质部。 xylem ray 木射线。

• carinal xylem:    脊木质部
• centrifugal xylem:    离心木质部
• centripetal xylem:    向心木质部

例句与用法

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1. The xylem of ferns and conifers contains only tracheids .
   蕨类植物和针叶树的木质部仅含有管胞。
2. Sapwood contains xylem vessels, but not as strong as heartwood .
   边材含有木质导管，但不如中心木质那样坚硬。
3. Secondary xylem consists of pitted vessels, parenchyma fibers and rays .
   次生木质部由孔纹导管、薄壁组织及射线所组成。
4. A system confined to the transport of mineral elements is known as the xylem .
   专门用来运输矿物元素的系统称为木质部。
5. The stele includes all primary tissues derived from the procambium consists of pericycle，phloem and xylem .
   中柱包括从原形成层衍生而来的全部初生组织，由中柱鞘、韧质部和木质部组成。

英文释义

名词

1. the woody part of plants: the supporting and water-conducting tissue, consisting primarily of tracheids and vessels