A dorsiventral (Lat. dorsum, "the back", venter, "the belly") organ is one that has two surfaces differing from each other in appearance and structure, as an ordinary leaf.
例句与用法
1.
Dorsiventral describing a structure that has distinct upper and lower surfaces . a dorsiventrally flattened structure has flat dorsal and ventral surfaces and very narrow lateral surfaces 异面（背腹型） :指上下表面结构具有明显差异。异面平滑结构指有平滑的背、腹面，以及非常狭窄的侧表面。
2.
Like thallose liverworts , the hornworts have an alternation of generations in which the gametophyte is a dorsiventral flattened green phallus and the saprophyte is an upright structure that has a foot embedded in the gametophytes , from which it draws nutrition 与叶状体植物地钱一样，角苔具有明显的世代交替， ，配子体在世代交替中占优势，孢子体占劣势且利用其基足插入配子体的组织中吸取养料，以供孢子体生长。
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