What change occurs in the urinary system as a person ages?

As individuals age, a common change in the urinary system is the weakening of the bladder muscles. This weakening can lead to a variety of urinary issues, such as increased frequency of urination, urgency, and a higher likelihood of incontinence. As the bladder muscles lose strength, they may not contract effectively, making it challenging for individuals to fully empty their bladders or control their urination.

In contrast, the other options suggest improvements or increases that are generally not associated with aging. For example, increased bladder size or larger bladder capacity are not typically observed; instead, the bladder may become less flexible with age. Improved bladder function does not align with the common physiological changes experienced as one gets older, making the weakening of the bladder muscles a significant and relevant change in the urinary system for the aging population.