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个小盏合成大盏；2-3个大盏合并形成漏斗形。

The medulla is made up of 10 to 18 renal pyramids with the base of the pyramids facing the renal cortex and the tips of the pyramids, called renal papilla—or nipples, pointing towards the center of the kidney.

10-18个锥体构成，每个锥体基底面朝向皮；而尖端称作乳头，则朝向中心。

And then we look in a little more detail, you can see the individual papillae come up, and there are little ridges on there, so it's a papilla on papilla and so forth.

然后我们看得更详细一点，你可以看到单个乳突出现， 那里有小脊，所以它是乳突上乳突等等。