What is the function of the bladder in the body?

The bladder plays a crucial role in the urinary system by serving as a storage area for urine. Once the kidneys filter blood and produce urine, this urine flows down through the ureters and is stored in the bladder until it is ready to be excreted from the body. The bladder can expand to accommodate varying amounts of urine, indicating its function as a reservoir. This storage capability allows for the regulation of urination and provides control over when the body expels urine.

Unlike other organs mentioned in the choices, the bladder does not produce hormones, facilitate air passage, or filter blood. Hormone production is primarily associated with endocrine glands, the passage of air is managed by structures in the respiratory system, and blood filtration is performed by the kidneys. Thus, the bladder's specialized function in storing urine is essential for maintaining urinary health and overall bodily function.