植物叶子等器官通过碱液煮制等方法，可制出非常完整的叶脉标本，用于课堂教学对叶的输导组织（叶脉）进行观察治取得理想的效果。植物的果实中也布满了输导组织，日常教学和生活中都很难看到。有时即使可以看到，也只能看到某一小部分，根本看不到完整的果实输导组织标本。为? Plant leaves and other organs can be used to prepare very complete leaf vein specimens by lye boiling and other methods, which can be used for classroom teaching to achieve ideal results in observation and treatment of the leaf transmitting tissues (vein veins). The fruit of the plant is also covered with transfusion tissue, which is difficult to see in everyday teaching and life. Sometimes even if you can see it, you can only see a small part, and you can’t see the complete fruit transmission tissue sample at all. for?