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The lumen is the space in the middle also known as the volume. Normal histology of the breast , with lumen annotated at bottom right [ 1 ] In biology , a lumen ( pl. : lumina ) is the inside space of a tubular structure, such as an artery or intestine. [ 2 ]
From the inner cavity of the gut (the lumen) outwards, these are the mucosa, the submucosa, the muscular layer and the serosa or adventitia. The mucosa is the innermost layer of the gastrointestinal tract. It surrounds the lumen of the tract and comes into direct contact with digested food .
The hollow inner part of a body organ (such as the gastrointestinal tract) or tube (such as an artery) is called the lumen. The side of a cell facing the lumen is called the apical surface; the opposite side, facing away from the lumen is the basolateral surface, which faces instead towards the interstitium, and away from the lumen.
Luminal (from Latin lumen ' light, opening '): on the—hollow—inside of an organ's lumen (body cavity or tubular structure); [49] [50] adluminal is towards, abluminal is away from the lumen. [51] Opposite to outermost (the adventitia, serosa, or the cavity's wall). [52] Parietal (from Latin paries ' wall '): pertaining to the outer wall of a ...
Intestinal villi (sg.: villus) are small, finger-like projections that extend into the lumen of the small intestine.Each villus is approximately 0.5–1.6 mm in length (in humans), and has many microvilli projecting from the enterocytes of its epithelium which collectively form the striated or brush border.
Lumen may refer to: Lumen (unit), the SI unit of luminous flux; Lumen (anatomy), the cavity or channel within a tubular structure; Lumen (tech company), the health and wellness tech company; Lumen (band), a Russian rock band; Lumen (branding agency), a design and branding company headquartered in Milan, Italy
Upon entering the lumen of a lymphatic capillary, the collected fluid is known as lymph. Each lymphatic capillary carries lymph into a lymphatic vessel, which in turn connects to a lymph node, a small bean-shaped gland that filters and monitors the lymphatic fluid for infections. [1] Lymph is ultimately returned to the venous circulation.
In anatomy, the interstitium is a contiguous fluid-filled space existing between a structural barrier, such as a cell membrane or the skin, and internal structures, such as organs, including muscles and the circulatory system. [1] [2] The fluid in this space is called interstitial fluid, comprises water and solutes, and drains into the lymph ...