What Is the Urinary System?
The urinary system consists of the kidneys, ureters, bladder and urethra. Its main function is excretion. Excretion refers to the physiological processes that are produced during the metabolism of the body that are not used by the body or that are harmful to the body.
- Chinese name
- Urinary system
- Foreign name
- urinary system
- component
- Kidney, ureter, bladder and urethra
- The main function
- excretion
- Belong to
- Physiological process
- The urinary system consists of the kidneys, ureters, bladder and urethra. Its main function is excretion. Excretion refers to the physiological processes that are produced during the metabolism of the body that are not used by the body or that are harmful to the body.
Overview of the urinary system
- Part of the excreted material is a metabolite of nutrients; the other part is the waste formed when aging cells are destroyed. In addition, the excrement also includes some excess substances that are ingested with food, such as excess water and inorganic salts, and proteins.
The structure of the urinary system:
- It is an important excretion pathway of human metabolites. It can also regulate water and salt metabolism and acid-base balance, and produce a variety of biologically active substances, which plays an important role in maintaining the stability of the body's environment. The urinary system consists of a pair of kidneys, two ureters, a bladder and a urethra. The urine produced by the kidney flows into the bladder through the ureter for temporary storage. When the urine reaches a certain amount, it is excreted through the urethra. Therefore, it can also be said that the urinary system is a general term for organs for urination, urination, storage, and urination. The ureter is a pair of slender tubes with a total length of about 20 to 30 cm. It is connected to the renal pelvis and lower to the bladder. There are three narrow places in the middle. The bladder is a urine storage organ. Its size and shape change with the amount of urine. The triangle of the bladder is connected between the two ureteral orifices and the inner urethral orifice. It is also smooth when empty. This is the most common site for tumors and tuberculosis. . The bladder's urination reflex is controlled by the cerebral cortex and the spinal micturition center, and the pudendal nerve is transmitted to the somatic nerves, so urination can be controlled by consciousness. These structures are damaged and can cause urinary incontinence. If urine cannot be discharged from the bladder and is stored in the bladder, it is called urinary retention. It is normal for infants to have enuresis due to incomplete development of the cerebral cortex. Generally, this phenomenon can gradually disappear at the age of 2 to 3 years, while children with normal urination function can not control urine during sleep is called enuresis.