The icon "Kidney" resembles in general left human kidney. It is of the shape of a kidney bean. The attached ureter is hanging down from the middle of the kidney.
This Kidney icon is made in Material Design style
developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 6,000 icons, all in the same style and quality.