glomerulus

When the glomerulus has blood flow, in addition to blood cells and macromolecule proteins, some of the water, inorganic salts, glucose and urea in the plasma are filtered through the glomerulus into the glomerulus. The liquid is called urine

Renal tubules When the original urine flows through the renal tubules, all the glucose, most of the water and some inorganic salts are reabsorbed by the renal tubules.

The filtration function of the inner wall of the glomerulus and renal capsule

tubular reabsorption

Original urine: water 98, protein 0.03, glucose 0.1, inorganic salts 0.72, urea 0.03

Urine: water 96, protein 0, glucose 0, inorganic salts 1.1, urea 1.8 (the renal tubules reabsorbed most of the water, resulting in an increase in urea content)

Remove waste products from the body

Regulate the balance of water and inorganic salts in the body and maintain normal physiological functions of tissue cells