A separate nephron consists of a capsule and a renal tubule. Due to the high blood pressure in the glomerular capillaries, water and small molecules of various substances contained in the blood plasma pass through the thin single-layer walls of the capsule and enter the slit space of the capsule, from which the renal canal begins. The resulting solution is called primary urine.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.