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生为长什在么美巨国杉的中一间株开巨洞杉,。树人却不会死亡? 们在它的树干下部开了一个 洞,可以通过汽车,或者让 四个骑马的人并排通过。
一、水分和无机盐的运输 探究实验:
茎的输导功能
说明茎将红 色的水溶液 运输到叶。
甲:剥掉树皮
想一想:运 输的方向?
乙:没剥树皮 由下而上。
现象:叶脉变红了,液面下降。
内有起输导作用的导管 贮藏营养
看看你聪 明吗?
你能判断这棵大树的年龄吗
想一想
1.树皮的外侧部分的功能是什么? 保护 内侧部分是什么? 韧皮部 内有什么结构? 筛管 属于什么组织? 输导组织
2.木质部使植物茎很坚硬,内有什么结构? 导管 属于什么组织? 输导组织
3.位于中央颜色较浅的是髓,其细胞比较大,
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