human_reference_atlas part of Homo sapiens nephron tubule descending limb of loop of Henle http://upload.wikimedia.org/wikipedia/commons/0/02/Gray1128.png descending limb of Henle's loop UBERON:0001289 Loop of Henle (Thin Limb) descending limb FMA:17705 AS SCTID:245350001 loop of Henle descending limb The portion of the renal tubule that constitutes the proximal part of the loop of Henle, has low permeability to ions and urea, and is highly permeable to water; it consists of an initial short thick segment lined by low simple cuboidal epithelium and a long thin segment lined by simple squamous epithelium; however, this distinction is not as important physiologically as in the ascending limb, so often the two are treated as one structure. uberon EMAPA:35511 Wikipedia:Descending_limb_of_loop_of_henle MA:0001679 loop of henle (thin limb) NCIT:C32456 UMLS:C0227657 kidney outer medulla inner stripe region of nephron tubule