Organize the following structures in order of urinary flow: Bladder, Kidney, Urethra, Ureter

The correct sequence of structures in the urinary flow begins at the kidneys, which are responsible for filtering blood to create urine. The urine then travels from the kidneys through the ureters, which are tubes that actively transport urine to the bladder. Once the urine fills the bladder, it is stored until it is ready to be expelled from the body. The final step in this flow involves the urethra, which is the tube through which urine exits the bladder and the body.

In summary, the order of urinary flow is: Kidney (produces urine) → Ureter (transports urine) → Bladder (stores urine) → Urethra (excretes urine). This progression is fundamental to understanding the urinary system's anatomy and function.