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24 Cards in this Set
- Front
- Back
What vessels provide the blood required for an erection?
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Dorsal arteries of the penis
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What tissue does the dorsal arteries of the penis engorge?
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Spongy corpora cavernosa
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For engorgement, what must relax?
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The smooth muscle of the corpora
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What causes blood to pool in erectile tissues?
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Outflowing veins are compressed by the tunica albuginea, closing them
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Dysfunction of what may interfere with engorgement of the corpus cavernosum and produce impotence?
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Autonomic nerves
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Why is the male urethra susceptible to rupture?
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Due to the change in direction between the membranous and penile urethra
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Where can the urethra be ruptured if the pelvis is fractured?
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U-G diaphragm
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What is the result of a rupture of either the membranous or penile urethra?
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Extraversion of urine into the superficial perineal pouch
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With a urethral rupture in which the Buck's fascia is intact, where will the urine be located?
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In the U-G diaphragm between the perineal membrane and deep fascial layer
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If there is a urethral rupture and Buck's Fascia is **NOT** intact, where will the urine go?
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Goes into the superficial perineal pouch which can extend to perineum, scrotum and into the lower abdomen
limited by Scarpa's and Colle's Fascia |
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Why will urine NOT go into the thigh with a ruptured urethra?
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Fusion of Scarpa's fascia with the fascia lata inferior to the inguinal lig
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What is the most common symptom of an enlarged prostate and why does it happen?
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Difficulty in micturition
Due to a narrowed prostatic urethra |
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A Trans-Urethral Resection (TURP) uses a flexible device to open up a narrowed urethra due to an enlarged benign prostate. What does this do to the ejaculatory ducts?
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It chops and blocks the openings of the ejaculatory ducts
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In males, what does the genital tubercle elongate into?
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phallus, which pulls the urethral folds together to form the penile urethra
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What do the urethral swellings form?
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They expand and fuse midline to form the scrotum
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What does the inferior portion of the urogenital sinus develop into?
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differentiate into the prostatic and membranous urethra
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What does the prostatic urethra merge with and what does this merge form?
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Joins the ejaculatory ducts to create the urinary/genital continuum
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What do the primitive sex cords develop into?
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Proliferate and penetrate into the medulla to become the testis cords
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When the cords break distally, what do they become?
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Rete testis and seminiferous tubules
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When the connection between the sex cords and surface epithelium is lost, an intervening layer will differentiate into what?
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Tunica albuginea
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The mesonephric duct develops into what in the male?
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Efferent Ductules
Epididymis Ductus Deferens Seminal Vesicle Ejaculatory duct |
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What happens to the paramesonephric duct in the male?
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It disappears
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What is the dorsum of the penis?
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It is the top portion of the penis (closest to stomach)
You name the penis according to its erect position |
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Parasympathetic axons supply the bladder and allow engorgement. What are these levels of nerves?
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S2,3,4... keep the penis off the floor
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