Which is the proper order of structures that contact the substances removed from the blood? nephron → urethra → bladder → ureter
urethra → ureter → bladder → nephron
nephron → ureter → bladder → urethra
urethra → bladder → ureter → nephron

nephron → ureter → bladder → urethra

Explanation:

The nephron, a functioning unit of the kidney, filters blood and is where urine is produced. Once there is urine, it empties into the ureter, a tube from the kidney to the bladder. The urine is then temporarily stored in the bladder until the body is ready to excrete the urine through another tube called the urethra.

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explanation: