RT Book, Section A1 Tanagho, Emil A. A1 Nguyen, Hiep T. A2 McAninch, Jack W. A2 Lue, Tom F. SR Print(0) ID 56940258 T1 Chapter 2. Embryology of the Genitourinary System T2 Smith & Tanagho's General Urology, 18e YR 2013 FD 2013 PB The McGraw-Hill Companies PP New York, NY SN 978-0-07-162497-8 LK accesssurgery.mhmedical.com/content.aspx?aid=56940258 RD 2024/03/28 AB At birth, the genital and urinary systems are related only in the sense that they share certain common passages. Embryologically, however, they are intimately related. Because of the complex interrelationships of the embryonic phases of the two systems, they are discussed here as five subdivisions: the nephric system, the vesicourethral unit, the gonads, the genital duct system, and the external genitalia.