It contains microscopic, fluid-filled tubules that run from the pulp to the underside of the enamel.

它包含微小的、充满液体的小管，从牙髓一直到牙釉质下层。

ADH affects the last two-thirds of these tubes, called the distal convoluted tubule and the collecting ducts.

ADH作用于这些小管的终末2/3部分，即远曲小管和集合管。

If your enamel is worn away, your dentin and its tubules can be exposed.

如果你的牙釉质被磨掉了，你的牙本质和它的小管就会暴露出来。

And this is showing us the digestive tubules of these animals.

这向我们展示了这些动物的消化管。

Macula densa cells are located in the distal convoluted tubule and they can sense when levels of sodium and chloride are low.

致密斑位于远曲小管，可以感受到钠和氯水平降低。

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。

Some substances are removed from blood through the peritubular capillary network into the distal convoluted tubule or collecting duct.

有些物质通过管周毛细血管网从血液中移出，进入远曲小管或集合管。

These are basically molds of the insides of your kidney’s tubules, and they can be a sign of kidney disease.

这些基本上是肾小管内部的霉菌，它们可能是肾脏疾病的征兆。

So when ADH is low, most of the water flows through the the distal convoluted tubule and the collecting duct, giving us diluted urine.

所以当血中ADH水平低时，大部分水就顺着远曲小管和集合管排出体外，尿液也就被稀释。

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。