How many kidneys do humans usually have?
Quick Answer
Most humans have 2 kidneys. They work together to filter blood, balance fluids, and help regulate blood pressure.
The Full Story
Humans usually have two kidneys, one on each side of the spine in the back of the abdomen. Each kidney contains about a million tiny filtering units called nephrons. The kidneys remove wastes, help control blood pressure, balance salts and water, and contribute to red blood cell production through hormone signals. A person can live with one healthy kidney, which is why some people can donate one. Though the kidneys are small compared with other organs, they process a very large volume of blood each day.
Key Facts
YouTube Angle
Suggested video title for this topic:
"Two bean-shaped organs quietly keep your blood chemistry in balance."
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