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What are the three phases involved in Formation of urine in kidney tubules?
Wiki User
∙ 14y ago
The three phases involved in the formation of urine in the kidney tubules are :
1.Simple filtration- large molecules like blood cells and plasma proteins are unable to filter through the first part of the tubules and so stay in the blood.
2.Selective reabsorption- this is where those substances needed by the body, like sodium potassium ,are reabsorbed in the kidney to maintain the correct amount of fluid and substances.
3.Secretion- substances that are not required by the body and foreign materials, like drugs, are then secreted from the blood into the urine.
Wiki User
∙ 14y ago
Wiki User
∙ 12y agoKidneys filter blood that has collected wastes from cells. Nephrons then filter that inside the kidneys. That produces urine which is 96% water, 4% urea and other wastes. Ureters pass the urine from each kidney to the bladder that holds urine. Then it goes through the urethra and out of the body.
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