bounding layer of bounding layer of anatomical structure membranous layer capsule see also: protective structure surrounding some species of bacteria and fungi. Note that FMA has classes such as Articular capsule that are not subtypes of Capsule (which is undefined in FMA). GO has 'capsule' which is a fungal structure, and 'external encapsulating structure' which is restricted to cells EHDAA:4739 FMA:85272 A cover or envelope partly or wholly surrounding a structure. Examples: egg shell, articular capsules, renal capsules[WP]. EHDAA:9061 Wikipedia:Capsule_(anatomy) capsular UBERON:0003893 galen:Capsule