Lumen (anatomy) facts for kids
In biology, a lumen (plural lumina) is the inside space of a tubular structure, such as an artery or intestine.
Two examples are the interior of a vessel, such as the central space in an artery, vein or capillary through which blood flows or the interior of the gastrointestinal tract.
See also
In Spanish: Lumen (biología) para niños
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Lumen (anatomy) Facts for Kids. Kiddle Encyclopedia.