What Are Glomeruli?
The glomeruli are the filters of the kidneys which filter the blood and make urine. Normally, large molecules such as proteins and cells such as red blood cells or white blood cells do not pass through the filter and are retained within the blood because they are so important for health. Small molecules pass completely through the filters. Most of these are completely reabsorbed back into the blood since they are so important in maintaining the right chemical balance of the body e.g. glucose, salt etc. Other molecules which are not required for body functions are passed freely into the urine, for example urea, uric acid, creatinine etc.
