 
 <translate> 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? <ibo> Nye ụfọdụ iyi nke nsụhọ na mgbe ahụ azịza ya. Nephron (site n'okwu Grik νεφρός - nephros, nke pụtara "akụrụ") bụ akụkụ dị nta nke akụrụ. Ọ bụ akụrụ corpuscle na akụrụ tubule. Ọkpụkpụ akụrụ mejupụtara ụyọkọ akwara ndị a na-akpọ glomerulus na capsule Bowman nke na-ekpuchi ya. Tubule akụrụ na-esite na capsule. A na-ejikọta capsule na tubule ma mejupụtara mkpụrụ ndụ epithelial na lumen. N'ime akụrụ nke ọ bụla nke onye toro eto nke ahụ́ dị mma, e nwere ihe dị ka nde nephrons 0.8 ruo nde 1.5. A na-enyocha ọbara ka ọ na-agafe n'akpụkpọ atọ: mkpụrụ ndụ endothelial nke mgbidi akwara ọbara, akpụkpọ ahụ ya dị n'okpuru, na n'agbata ụkwụ nke podocytes nke mkpuchi nke capsule ahụ. Tubule nwere akwara peritubular dị n'akụkụ nke na-aga n'etiti akụkụ na-agbadata na nke na-arịgo elu nke tubule. Ka mmiri si na capsule na-agbadata n'ime tubule, mkpụrụ ndụ epithelial nke na-ekpuchi tubule na-edozi ya: a na-amịghachi mmiri ma na-agbanwe ihe (a na-agbakwunye ụfọdụ, a na-ewepụ ndị ọzọ); nke mbụ na mmiri mmiri dị n'etiti n'èzí tubules, wee banye na plasma na capillaries peritubular dị nso site na mkpụrụ ndụ endothelial nke na-ekpuchi capillary ahụ. Usoro a na-achịkwa mmiri ndị dị n'ahụ́ nakwa otú ọtụtụ ihe ndị dị n'ahụ mmadụ hà. N'ọgwụgwụ nke tubule ahụ, mmiri ahụ fọdụrụnụ - ọsụsọ - na-apụta: mmiri, ihe ndị na-esi n'ihe ndị na-eme n'ahụ́ apụta, na nsí dị iche iche.  Zaa ajụjụ a: Gịnị bụ nkeji nke akụrụ? 