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The duct of a lumen is a passageway that allows substances to flow through a hollow structure, such as in the case of the digestive or excretory systems. The lumen refers to the central space within a tube or vessel where substances pass through. Collectively, the duct and lumen work together to transport materials within the body.

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1y ago

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What is the general term that refers to an open area throughout the length of a tube or duct?

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