The formation process of urine

Eating, drinking, defecating and urinating are things that each of us has to deal with every day. In daily life, we should observe the color and smell of urine. Through the symptoms of urine, we can understand whether our reproductive system is healthy? Is our urinary system healthy? It is also a relatively obvious sign of kidney health. The formation process of urine is through the kidneys. It sounds simple, but its formation process is relatively complicated.

The process of urine formation

Urine is mainly formed in the kidneys, which are the main organs in the human body with urinary function. The kidneys produce urine through glomerular filtration, reabsorption in the renal tubules and collecting ducts, and secretion.

It sounds simple, but the process of urine formation is actually very complicated! Let the experts explain it to you in detail.

Urine is first filtered through the glomeruli in the kidneys to form ultrafiltrate. The human body normally produces up to 180 liters of ultrafiltrate per day. After the ultrafiltrate enters the renal tubules, it is called tubular fluid. Then the renal tubules and collecting ducts can reabsorb most of the body's water and various solutes back into the blood, which is called reabsorption. In addition, the renal tubules and collecting ducts also have the function of secretion, which can secrete certain substances into the tubular lumen, which is called secretion. Through reabsorption and secretion of the renal tubules and collecting ducts, the human body normally produces only 1.5 liters of urine per day.

How to judge physical condition from abnormal urine

Incomplete urination: Incomplete urination refers to the phenomenon that urine is always not discharged completely or is not completely discharged during urination. It is more common in male prostate diseases, urinary stones, urinary tract tumors and physiological structural abnormalities.

Weak urination: You have the energy to eat, but cannot use it to urinate, and urine is discharged slowly and weakly. It is common in patients with prostatic hyperplasia and chronic prostatitis.

Dysuria: Dysuria refers to the inability to expel urine naturally during urination. Urinary dysfunction takes a long time, and some urine comes out drip by drip. You may even need to inflate your stomach to expel urine. Such a situation often indicates diseases such as prostate hypertrophy, prostate cancer, acute prostatitis, urethritis, stones, tumors, and urethral tumors.

Urine bifurcation: Urine bifurcation refers to the formation of two or more urine streams at the urethral opening when urine flows out. This urination symptom is more common in patients with prostatitis and prostatic hyperplasia.

Urethral irritation signs: Frequent urination refers to the number of urinations significantly greater than normal (an average of 4-6 times a day for adult males, and 0-1 times at night); urgency refers to the feeling of urgency when urinating, and the inability to wait and control it; dysuria refers to discomfort in the urinary tract or urethral opening during urination, including pain, burning sensation, etc.