As the filtrate leaves the Bowman's capsule it flows into the renal tubule, which is surrounded by the peritubular capillaries.

滤液离开肾小囊后流入肾小管，后者被管周毛细血管网包围。

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。

Now, before we dive too far in here, let's re-draw the nephron so that the structure of the renal tubule is a little more accurate.

现在，趁还没有学得更深，我们来画一个肾单位，让肾小管的结构更加精确。

This external balancing act is largely taken care of by the kidneys, where excess potassium is secreted into a renal tubule and excreted in the urine.

肾在外钾平衡起主要作用，它可以把多余的钾分泌到肾小管中，然后从尿排出。

If Leptospira gets to the kidneys, it may infect the interstitium, causing interstitial nephritis, or it may cause an inflammatory reaction that damages the renal tubules, resulting in acute tubular necrosis.

如果钩端螺旋体进入肾脏，它会感染肾间质而引起间质性肾炎，也能引发炎性反应损伤肾小管，导致急性肾小管坏死。

Blood gets into the kidney through the renal artery, into tiny clumps of arterioles called glomeruli where it's initially filtered, with the filtrate, the stuff filtered out, moving into the renal tubule.

血液通过肾动脉流入肾脏，一旦入肾，便进入一小团小动脉，即肾小球，开始过滤；滤液过滤出来，进入肾小管。