The correct spelling of the word "brain bladder" is actually "urinary bladder." This confusion may occur due to the similarity of the sounds of the words "brain" and "urine." The phonetic transcription of "urinary bladder" is /jʊrənɛri ˈblædər/. The first syllable "urin" is pronounced with the "y" sound as in "you," followed by the "er" sound, and then the "n" sound. The second syllable "ary" is pronounced as "air-ee." The final syllable "bladder" is pronounced with the "a" sound as in "bat," followed by "der" with the "er" sound.
A cerebral vesicle in the embryo.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.