 
<translate> Ka ba da wani rafi na sani sannan kuma amsar. Nephron (daga Girkanci νεφρός - nephros, ma'ana " kodan ") shine tsarin microscopic da aiki na koda. Ya ƙunshi ƙwayar koda da tubule na koda. Kidney corpuscle yana kunshe da wani nau'i na capillaries da ake kira glomerulus da kuma Bowman's capsule. Tubule na koda yana fitowa daga kwaya. An haɗa capsule da tubule kuma sun ƙunshi ƙwayoyin epithelial tare da lumen. Mutum mai lafiya yana da nephrons miliyan 0.8 zuwa miliyan 1.5 a kowace koda. Ana tace jini yayin da yake wucewa ta yadudduka uku: ƙwayoyin endothelial na bangon capillary, membrane na tushe, da kuma tsakanin matakan ƙafa na podocytes na layin capsule. Tubule yana da ƙwayoyin peritubular da ke kusa da ke gudana tsakanin sassan da ke saukowa da sassan tubule. Yayin da ruwa daga kwayar ke gudana zuwa cikin tubule, ƙwayoyin epithelial da ke kewaye da tubule suna sarrafa shi: ana sake shan ruwa kuma ana musayar abubuwa (wasu ana ƙarawa, wasu kuma ana cire su); da farko tare da ruwa mai tsaka-tsaki a waje da tubules, sannan zuwa cikin plasma a cikin capillaries na peritubular masu kusa ta hanyar ƙwayoyin endothelial da ke kewaye da wannan capillary. Wannan tsari yana daidaita yawan ruwan jiki da kuma matakan abubuwa da yawa na jiki. A ƙarshen tubule, sauran ruwa - fitsari - yana fita: ya ƙunshi ruwa, sharar gida, da gubobi.  Amsa wannan tambayar: menene ma'aunin ƙwayar koda? <eng> Give some stream of consciousness and then the answer. The nephron (from Greek νεφρός -- nephros, meaning "kidney") is the microscopic structural and functional unit of the kidney. It is composed of a renal corpuscle and a renal tubule. The renal corpuscle consists of a tuft of capillaries called a glomerulus and an encompassing Bowman's capsule. The renal tubule extends from the capsule. The capsule and tubule are connected and are composed of epithelial cells with a lumen. A healthy adult has 0.8 to 1.5 million nephrons in each kidney. Blood is filtered as it passes through three layers: the endothelial cells of the capillary wall, its basement membrane, and between the foot processes of the podocytes of the lining of the capsule. The tubule has adjacent peritubular capillaries that run between the descending and ascending portions of the tubule. As the fluid from the capsule flows down into the tubule, it is processed by the epithelial cells lining the tubule: water is reabsorbed and substances are exchanged (some are added, others are removed); first with the interstitial fluid outside the tubules, and then into the plasma in the adjacent peritubular capillaries through the endothelial cells lining that capillary. This process regulates the volume of body fluid as well as levels of many body substances. At the end of the tubule, the remaining fluid -- urine -- exits: it is composed of water, metabolic waste, and toxins.

Answer this question: what is the microscopic unit of the kidney? 