Biology

Answer: B

Explanation:

Correct Option: The circulatory system, specifically the blood vessels, delivers oxygen - rich blood to the kidneys and other parts of the urinary system.
This oxygen is essential for the cells in the urinary system to carry out their metabolic functions.
In return, the kidneys, which are part of the urinary system, filter waste products, excess water, and ions from the blood that is supplied by the circulatory system.
This filtration process helps to maintain the proper composition and health of the blood in the circulatory system.

Incorrect Options:

Option A: Red blood cells are produced in the bone marrow, not in the urinary system.
The urinary system does pr...