part_of part of part of contributes to morphology of Homo sapiens Homo sapiens loop of Henle descending limb of loop of Henle http://upload.wikimedia.org/wikipedia/commons/0/02/Gray1128.png descending limb of Henle's loop UBERON:0001289 descending limb FMA:17705 SCTID:245350001 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 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 NCIT:C32456 UMLS:C0227657 region of nephron tubule