Multiple choice The function of the kidney in the body is the filtration of liquid waste from the blood filtration of solid waste from the body filtration of liquid and solid waste from blood filtration of carbon dioxide from the blood Reveal answer Fill a bubble to check yourself A Correct answer Explanation The primary function of the kidneys is to filter waste products, excess water, and impurities from the blood to form urine. This is a vital process for maintaining homeostasis.