点击此处观看更多视频：https://alugha.com/FuseSchool Xylem and Phloem——第 2 部分——蒸腾——植物中的运输：https://bit.ly/39SwKmN 木质部和韧皮部——第 3 部分——易位——植物运输：https://bit.ly/2XescTp The Leaf 的结构：https://bit.ly/3aRYoS9 植物有运输系统可以四处移动物品。 木质部通过一种称为蒸腾的过程将水和溶质从根部移动到叶子。 韧皮部将葡萄糖和氨基酸从植物周围的叶子中移走，这个过程被称为易位。 木质部和韧皮部分组排列，称为血管束。根部和茎的排列略有不同。木质部由死细胞组成，而韧皮部由活细胞组成。 订阅 FuseSchool 频道观看更多教育视频。我们的老师和动画师齐聚一堂，制作有趣且易于理解的化学、生物、物理、数学和信息通信技术视频。 通过 www.fuseschool.org 加入我们的平台 这些视频可以在翻转的课堂模型中使用，也可以用作复习辅助工具。 推特：https://twitter.com/fuseSchool 在 FuseSchool 平台和应用程序中获得更深入的学习体验：www.fuseschool.org 此开放教育资源是免费的，根据知识共享许可：署名-非商业性 CC BY-NC（查看许可证契约：http://creativecommons.org/licenses/by-nc/4.0/）。您可以下载该视频用于非营利性教育用途。如果你想修改视频，请联系我们：info@fuseschool.org
Algebraic fractions are simply fractions with algebraic expressions either on the top, bottom or both. We treat them in the same way as we would numerical fractions. In this video we look at how to simplify algebraic fractions, and how to add and subtract them. VISIT us at www.fuseschool.org, wh
CREDITS Animation & Design: Peter van de Heuvel Narration: Lucy Billings Script: Lucy Billings The word polygon comes from Greek. Poly means “many” and Gon means “angles”. Polygon = many angles. Polygons are 2-dimensional shapes, that are made of straight lines, with all the sides joined up. VISIT
In algebra we have lots of different names for different things: expressions, equations, formulae and identities are all slightly different versions of similar things. Then within these, we have variables, constants, coefficients and exponents to describe the different parts. We also need to know wh
