Urine collects in the renal pelvis and then heads out of the kidney through the ureter.

尿液在盂中聚集，然后通过输尿管排出脏。

In grade III, urine fills and begins to stretch both the ureter and the renal pelvis.

尿液的充盈致输尿管和盂扩张。

The renal papilla project into minor calyces which join together to form major calyces which funnel into the renal pelvis.

乳头突入小盏，每2-3个小盏大盏；2-3个大盏并形漏斗形的盂。

In grade II, urine fills the entire ureter and the renal pelvis, the center part of the kidney.

尿液充满整个输尿管和盂，即的中心部分。

There are three major regions of the kidney, cortex, medulla and the renal pelvis.

皮质、髓质和盂。外层的颗粒状层是皮质。

Once millions of nephrons have each made urine, it flows into the minor calyces, then major calyces, and finally into the renal pelvis.

当数以百万计的单位各自都产生尿液，尿液便流入小盏，然后是大盏，最终进入盂。

In grade IV, the ureter is so swollen that it begins to get curvy and the renal pelvis and calyces—the urine collection ducts—become moderately swollen and distorted.

输尿管过于肿胀，甚至产生卷曲，盂、盏和集管发生中度肿胀和扭曲。