What is the primary function of the bladder in the urinary system?

The primary function of the bladder in the urinary system is to store urine until it is ready to be eliminated from the body. The bladder is a muscular sac located in the pelvis, and it has the unique ability to expand and contract as it fills and empties. This function allows the body to collect urine produced by the kidneys and hold it until a convenient time for urination.

During the process of urination, the bladder contracts to expel urine through the urethra, allowing for controlled elimination. This storage capability is essential for maintaining a healthy balance of fluids and waste removal in the body.

In contrast, the functions of filtering blood and producing urine are primarily carried out by the kidneys. The kidneys filter waste and excess substances from the blood to form urine, which is then transported to the bladder for storage. The transport of urine to the kidneys does not occur, as urine is moved from the kidneys to the bladder, not the other way around.