Medical definition of the college
Kidneys and kidneys: They are an active member in maintaining blood balance in terms of survival of desired substances, disposal of substances to be disposed of, a member of the urinary system, and active member in balancing the volume of fluids in the body.
Anatomy of kidney parts
The anatomical cross-section of the kidney resembles the shape of the bean with the difference in size between them, which may reach up to 12 cm per kidney, enter the renal vein, and exit the renal artery and ureter. The kidney covers a smooth outer layer called the renal wallet, which surrounds a lower layer called cortex , Which consists of molecular units called the billion, which number about one million million, and surround the cortex with an inner layer of the kidney called the heart of the kidney, which consists of building units called pyramids, renal, which is a pyramidal form contains thousands of tubes that collect urine, And put in the inner space deeper than the so-called small cup; to be transferred urine to a tube called a hive, which is divided into a number of large cups, to be able to put urine through the ureter to the bladder.
College site
The kidneys are located in the abdominal cavity of the human in terms of the back wall of the abdomen, and take positions on the sides of the spine, to visit the site of the left kidney of the location of the right kidney down slightly, the right kidney is near the colon, the twelve, and liver, , And her sister left kidney, her face looking at her neighbor stomach, spleen, pancreas, and the other bank of the colon, and took the kidneys of the dorsal place, has passed behind the diaphragm, and the left kidney is protected by the 12th rib of the rib cage, Left ribs atheist and twelfth of the rib cage; as mentioned above between the kidneys paraphrenia.
College functions
- The blood is filtered from the metabolites of the body, disposed of and put out of the body, becoming toxic substances that affect the body.
- Maintain the desired level of water and salts in the body, through the centers of feeling regarding the pressure of fluids, and the secretion of diuretics to get rid of the excess of the need of the body of water, and non-retention of questions in the body.
- Maintain appropriate blood pH in terms of alkalinity and acidity.
- Contributes to the maintenance of bone structure by stabilizing calcium in the bones by activating vitamin D.
- Contributes to the building of red blood cells, where you activate the bone marrow to this end, and through the secretion of hormones.
- It balances the blood pressure by reducing the pressure in cases of elevation, through the administration of urine.