"<em>A</em>, pyramids of the kidney; <em>B</em>, apices, or papillae, of the pyramids; <em>C</em>, pelvis of the kidney; <em>D</em>, upper end of the ureter</em>." &mdash; Blaisedell, 1904

Kidney

"A, pyramids of the kidney; B, apices, or papillae, of the pyramids; C, pelvis…