Within each kidney, there are about 1 million nephrons, and each nephron is made up of a renal corpuscle and a renal tubule.

每个肾约有100万个肾单位，每个肾单位由肾小体、肾小管组成。

The renal corpuscle is where blood filtration starts and it includes the glomerulus - the tiny bed of capillaries - and the Bowman's capsule which is made of renal cells that surround the glomerulus.

肾小体是血液滤过的起始部位，包括肾小球（毛细血管网）和肾小囊（Bowman's capsule）。