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.
In this way, your kidneys regulate the body's level of these substances. The right balance is necessary for life, but excess levels can be harmful. In the nephron (left), tiny blood vessels intertwine with urine-collecting tubes. Each kidney contains about 1 million nephrons. In addition to removing wastes, your kidneys release three important hormones: 1  Erythropoietin (eh-RITH-ro-POYeh-tin), or EPO, which stimulates the bones to make red blood cells. 2  Renin (REE-nin), which regulates blood pressure.
The kidneys are bean-shaped organs that serve several essential regulatory roles in vertebrates. They remove excess organic molecules from the blood, and it is by this action that their best-known function is performed: the removal of waste products of metabolism.idneys are essential to the urinary system and also serve homeostatic functions such as the regulation of electrolytes, maintenance of acidâbase balance, and regulation of blood pressure (via maintaining the salt and water balance).