膀胱 ぼうこう括約 かつやく すじじゃなかったです
bōkōkatsuyakusujijanakattadesu

Noun
Desu Copula

The polite, past negative form of 膀胱括約筋

1. Wasn't the urethral sphincter.; Wasn't a bladder sphincter.

Past/Perfective
Negative
Polite
Casual Register