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lumen - the central opening within a tube or hollow organ.

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What is the name of the steel tube placed within a blood vessel?

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What is the difference between orifice and lumen?

An orifice is an opening or hole, whereas a lumen refers to the inner space or cavity within a tubular structure such as a blood vessel or intestine. In simpler terms, an orifice is an opening, while a lumen is the space inside that opening.


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How is a roundworm's digestive tract like a tube-within-a-tube?

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Which phylum of animals has a body plan that is essentially a tube within a tube?

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When was Finchley Central tube station created?

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When was Hendon Central tube station created?

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When was Hounslow Central tube station created?

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