The kidneys contains millions of tiny filtering units called
urine
villi
peristalsis
nephrons
nephrons
The correct answer is nephrons.
The correct answer is nephrons.
To arrive at this answer, you can consider the context of the question, which is about the kidneys and their filtering function. Once you have an understanding of what kidneys do, you can deduce that the term in question should be related to the filtering process.
One way to find the answer is to search for information about the kidneys and their anatomy. An internet search using relevant keywords like "kidney anatomy" or "kidney function" will lead you to reliable sources that explain the structure and function of the kidneys. From these sources, you will learn that nephrons are the functional units of the kidneys responsible for filtering waste products from the blood and producing urine.
In summary, a bit of background knowledge about the topic combined with conducting a search using relevant keywords will help you find the answer and confirm that nephrons are the correct answer.