Steps towards health. Water-salt exchange
The kidneys, adrenal hormones and the central nervous system play a leading role in maintaining and regulating the water-salt balance. The kidneys regulate the excretion or retention of water and electrolytes. This process depends on the concentration of salts in the body, which is maintained at the required level. Basically, this regulation is associated with sodium ions. kidneys The kidneys are part of the urinary system, which also includes the ureters, bladder, and urethra.The urine filtered by the kidneys descends through the ureters into the bladder, where it can stay for some time, and then, as a certain volume is reached, it is expelled out through the urethra. This is the main way out of the "waste fluid" from the body. Normally, urine does not contain the elements necessary for the body: proteins, amino acids, glucose.The kidneys are located in the retroperitoneal space on both sides of the spine, approximately around the 12th thoracic and 2nd lumbar vertebrae. As a...