MICROANATOMY

Detailed explanation-1: -The renal pelvis is occasionally called the pyelum (from Greek pýelos, “trough", ‘anything hollow’), and the combining form pyelo-denotes the renal pelvis (pyelo-is not to be confused with pyo-).

Detailed explanation-2: -For example, the term adrenal, the name of a ductless gland above the kidney, is composed of the prefix ad, which means near, and a root renal, which means kidney.

Detailed explanation-3: -The word pyelonephritis is formed by the Greek roots pyelo-from (púelos) renal pelvis and nephro-from (nephrós) kidney together with the suffix-itis from- (-itis) used in medicine to indicate diseases or inflammations.

Detailed explanation-4: -The area at the center of the kidney. Urine collects here and is funneled into the ureter, the tube that connects the kidney to the bladder.