8 Questions
What is the approximate length of the kidneys in adult humans?
12 centimetres (4+1⁄2 inches)
What percentage of the blood volume that enters the kidneys is filtered?
One-fifth
What is the function of the nephron?
To filter the blood
What is the number of nephrons in each adult human kidney?
1 million
What is the term for the process of removing waste and excess substances from the blood?
Filtration
What is the function of the ureter?
To carry excreted urine to the bladder
What is the active form of vitamin D produced by the kidneys?
Calcitriol
What is the hormone produced by the kidneys that stimulates the production of red blood cells?
Erythropoietin
Learn about the structure and function of the human kidneys, including their location, size, and blood supply. Discover how they filter blood and produce urine. Test your knowledge of the kidneys' roles in the human body.
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