Answer :
Answer:
There isn’t a picture attached but I think it would be the same picture as the one I have below, which in that case the answer would be W, the renal artery.

The blood was first filtered is A. W
What is a Nephron?
Each of your kidneys is made up of about a million filters called nephrons. Each nephron consists of a filter, called a glomerulus, and a tubule. Nephrons operate in a two-step process: the glomerulus filters your blood, and the tube returns the nutrients in your bloodstream and removes impurities.
What are a nephron and its function?
The nephron, an active unit of the kidneys, is a structure that produces urine in the waste disposal system and substances in the blood. There are about 1,000,000 nephrons in each human kidney.
Learn more about Nephron at https://brainly.com/question/26062461
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