Question

what is lumen in biology?​

Answer 1

Answer:

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Explanation:

In biology, a lumen (plural lumina) is the inside space of a tubular structure, such as an artery or intestine. 1 It comes from Latin lumen, meaning 'an opening'. It can refer to: The interior of a vessel, such as the central space in an artery, vein or capillary through which blood flows.

Answer 2

Explanation:

$<font color=purple>$In biology, a lumen (plural lumina) is the inside space of a tubular structure, such as an artery or intestine. [1]1 It comes from Latin lumen, meaning 'an opening'.