There are three main steps to urine formation. In order, the tree steps of urine formation are glomerular filtration, tubular reabsorption, and tubular secretion. Each step is briefly explained below. Links to diagrams of urine formation are also included.
Glomerular filtration
During glomerular filtration, salts, nutrient molecules, and wastes move from the glomerulus to the inside of the glomerular capsule. These small molecules are called filtrate.
Tubular reabsorption
During tubular reabsorption, the nutrient molecules and...
There are three main steps to urine formation. In order, the tree steps of urine formation are glomerular filtration, tubular reabsorption, and tubular secretion. Each step is briefly explained below. Links to diagrams of urine formation are also included.
Glomerular filtration
During glomerular filtration, salts, nutrient molecules, and wastes move from the glomerulus to the inside of the glomerular capsule. These small molecules are called filtrate.
Tubular reabsorption
During tubular reabsorption, the nutrient molecules and salt molecular filtrated are reabsorbed from the convoluted tubules into the particular capillary network and water follows passively.
Tubular secretion
During tubular secretion, certain molecules are actively secreted from the particular capillary network into the convoluted tubules.
Urine excretion
Water is then reabsorbed and urine is passed via the renal tubule.
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