David is writing a report on diseases of the excretory system. choose the correct way to complete each sentence. is an inability to completely empty the bladder. it is an abnormal condition of urination characterized by poor urinary stream with intermittent flow, straining, a sense of incomplete voiding, and a delay between trying to urinate and the flow actually beginning. because the bladder remains full, urinary retention may lead to complications, including urinary incontinence, , and a frequent need to urinate. the most extreme kind of urinary retention is complete , which is the absence of urination and a medical emergency.