The relationship between kidney and bladder

There is actually a very important relationship between the kidneys and bladder. If one of them becomes diseased, it will affect the other. Therefore, it is best to go to the hospital for relevant treatment in time when a disease occurs. In this way, you can effectively prevent your condition from becoming more serious, and also excrete some harmful substances from the body as soon as possible to avoid complications.

1. Excrete metabolic products and harmful substances that enter the body

The human body is metabolizing every moment. In this process, some unnecessary or even harmful wastes are inevitably produced. A small part of them is excreted through the gastrointestinal tract, and most of them are excreted through the kidneys, thus maintaining the normal physiological activities of the human body. In addition, the kidneys can excrete some toxic substances that enter the body.

Some chemical poisoning can cause damage to the kidneys because these chemicals must be eliminated through the kidneys. If the kidneys are diseased, the excretion of these harmful substances will be affected, and waste will accumulate in the body, causing various diseases. We figuratively call the kidney's function of retaining nutrients and excreting toxins a "blood sieve."

2. Maintain water balance through urine production

This is the main function of the kidneys. When blood flows through the glomerulus, due to pressure, a liquid called primary urine is filtered out that is similar to plasma but does not contain protein. When the primary urine passes through the renal tubules, most of the water, all of the sugar and part of the salt are reabsorbed and sent back to the blood, but most of the nitrogen is no longer absorbed back. The remaining concentrated fluid containing residual substances is urine, which accounts for about 1% of the original urine. The normal daily urine volume is 1000-2000 ml, which is generally light yellow in color and has a specific gravity between 1.003-1.030. If the specific gravity is too high, too low, or remains unchanged, or the urine volume is too much or too little, there is a possibility of renal insufficiency.

3. Maintain electrolyte and acid-base balance in the body

The kidneys regulate various ions (electrolytes) in the body. For example, the regulatory characteristics of sodium ions (Na+) are more excretion if you eat more, less excretion if you eat less, and no excretion if you don't eat; for potassium ions (K+), it is more excretion if you eat more, less excretion if you eat less, and excretion without eating; for chloride ions (Cl-), it is completed through the absorption and excretion of Na+, and the secretion process of H+ and ammonia (NH3). In addition, the kidneys also regulate the balance of ions such as phosphorus (P3-), calcium (Ca2+), and magnesium (Mg2+). The balance of these electrolytes is important for the osmotic pressure stability of body fluids.