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------------------------------------------------- cortex<br />
----------------------------------------------- endodermis<br />
----------------------------------------------- pericycle<br />
-------------------------------------------------- phloem<br />
-------------------------------------------------------- metaxylem<br />
--------------------------------------------- protoxylem<br />
Ranunculus sp. 毛 茛 根 橫 切 面 ( 雙 子 葉 ) root C.S. 400x mature root