如果你摘下一片树叶,你会看到叶片上有分枝状的叶脉,土壤中的水分通过叶片分枝成网的叶脉进入叶内,然后通过光合作用制造的糖,又流入茎根等处。叶脉之间的绿色组织叫叶肉,这是制造营养的工厂和车间,这些绿色组织都是由很小的细胞组成的。要是有显微镜时,可以轻轻地把叶 If you take off a leaf, you will see leafy branches on the leaf. The water in the soil enters the leaf through the leaf-branches of the leaf, and then the sugars made by photosynthesis flow into the root of the stem . The green tissue between the veins is called mesophyll, which is the plant and workshop for the manufacture of nutrients, all of which are made up of tiny cells. If you have a microscope, you can gently put the leaves