Uberon definition : The urethra is a renal system organ that carries urine from the bladder to outside
the body. The epithelium is the tubular, planar layer of cells through which the urine
passes..;
The urethra is a renal system organ that carries urine from the bladder to outside
the body. The epithelium is the tubular, planar layer of cells through which the urine
passes..