Silk counts to the strongest natural fabric in the world. Known for its softness, luster, beauty and luxurious look, silk fabric is one of the higher grade fabric providing comfort to the wearer in all types of weather. Keeping the body cool in summer and warm in winter, silk was discovered during 2640 B.C. in china.
While filtering, the kidneys produce urine to carry the toxins away. The urine is sent through two tubes called ureters down to the bladder, where the urine then leaves the body through the urethra. The kidneys also make hormones. These hormones help regulate blood pressure, make red blood cells and promote bone health.
Functions of the kidneys. 1  Filter and remove excess fluid, waste and toxic substances from the blood as urine. 2  Regulate the chemical composition of blood such as salt, potassium and acid. 3  Secrete three important hormones: 4  Erythropoietin: hormone which is needed to stimulate the production of red blood cells.