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

在盂中聚集，然后通过输管排出脏。

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

充盈开始导致输管和盂扩张。

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小盏合成盏；2-3盏合并形成漏斗形盂。

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

充满整输管和盂，即中心部分。

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.

当数以百万计单位各自都产生，便流入小盏，然后是盏，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.

输管过于肿胀，甚至开始产生卷曲，盂、盏和集合管发生中度肿胀和扭曲。