| 1. | All the vascular bundles are interconnected so that transport between organs carried on rapidly and efficiently .
所有维管束都互相连通，因而得以迅速而有效地完成器官之间的运输。
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| 2. | It shows one sheath around the vascular bundles
它显示出在维管束周围的鞘状构造。
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| 3. | It does not show sheaths around the vascular bundles
它并没有显示出在维管束周围的鞘状构造。
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| 4. | It shows two well - developed sheaths around the vascular bundles
它显示出两个发育完全之维管束鞘位于维管束周围。
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| 5. | Collateral vascular bundle
并行维管束
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| 6. | Concentric vascular bundle
同心维管束
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| 7. | Cauline vascular bundle
茎维管束
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| 8. | Vascular bundle sheath
维管束鞘
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| 9. | Palisade tissue is rich in saliferous vacuoles , while vascular bundle sheath is obvious
栅栏组织富含含盐液泡泡，维管束鞘明显。
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| 10. | Sepals contain several vascular bundles , and are thought to be derived from leaves
根据萼片内的许多维管束结构，通常认为其由叶发育而成。
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