Kidney- singular, kidneys- plural.
The word "kidney" is singular.The plural form is "kidneys."
An accessory kidney is an "extra" kidney.
The organ was called a kidney first. The kidney bean is called so because it is shaped like a kidney, the organ.
Kidney stones. Kidney failure.
The individual units of the kidney, called nephrons, produce urine and empty into structures called collecting ducts. Many nephrons empty into a single collecting duct. Similarly, many collecting ducts empty into a minor calyx. Minor calyces empty into a major calyx, and the major calyces empty into the singular renal pelvis (each kidney has a single pelvis). The renal pelvis empties into the ureter.
Kidney failure and kidney rejection can still remain after kidney transplant.
A person who donates a kidney is called a living kidney donor.
kidneys is the plural of kidney.
An opisthonephric kidney is the functional kidney of anamniotes, fish, and amphibians.
Edema means swelling. An edematous kidney is a swollen kidney.
In the Kidney.