Which region of the male urethra is incorporated into the bladder wall itself?

1. The male urethra is divided into preprostatic, prostatic, membranous and spongy regions. 2. The preprostatic segment is very short and sits inside the bladder wall. 3. The prostatic segment passes through the prostate gland and receives sperm and seminal vesicle secretions. 4. The membranous segment crosses the deep perineal muscles and the spongy segment runs through the corpus spongiosum. _Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 25 "The Urinary System", section 25.2 Gross Anatomy of Urine Transport_