Male Genitaia Flashcards
What are the erectile tissue of the penis?
- Corpus spongiosum
*contains the urethra
*extends from the bulb of the penis to the cone shaped glans with its expanded base or corona - 2 Corpora cavernosa
What is the function of the penis
- Excretes urine
- Introduces sperm into vagina
In uncircumcised men what is the glans covered by?
- Loose, hood-like skin fold called prepuce or foreskin
- Smegma or secretions of the glans may collect
Where does the urethra open?
- Into a vertical slit-like urethral meatus
What are the testes and what are they covered by
- They are paired ovoid glands consisting primarily of seminiferous tubules and interstitial tissue
*covered by a fibrous outer coating tunica albuginea
What are the normal size of the testes
Pre-puberty
*1.5 to 2 cm
Post-puberty
*4 to 5 cm
What is the scrotum
A loose wrinkled punch of skin and underlying the tunica darts
What does the scrotum contain
Its divided into two compartments each contains a testicle
What covers the testis posteriorly
Tunica vaginalis
*derived from the peritoneum of the abdomen
What can lead to an indirect inguinal hernia
If the peritoneal lining remains and open channel to the scrotum
What leads to a hydrocele
- The parietal and visceral layers form a potential space for the abnormal fluid accumulation
What is the purpose of the vas deferens
- Transports sperm from the tail of the epidermis along to the urethra
*will ascend from the scortal sac (as the spermatic cord) into the pelvic cavity through the inguinal canal via the external inguinal ring
What helps form the ejaculatory duct
- Vas deferens and seminal vesicle
What contributes to seminal fluid
- Secretions from the vas deferens, seminal vesicles and prostate
Which testis hangs lower?
- Left
*will produce spermatozoa and testosterone
What is the purpose of the epididymis
- On the posterolateral surface of each testis
*provides a reservoir for storage, maturation and transport of sperm
Where are femoral hernias located
- Inside the femoral canal
*presents as emergencies with bowl incarceration or strangulation
Where are indirect inguinal hernias located
- Develop at the internal inguinal ring (into the abdominal canal)
*where the spermatic cord exits the abdomen
Where are direct hernias located
- Arise more medially due to weakness in the flor of the inguinal canal
*associated with straining and heavy lifting
When does sexual differentiation happen by?
12 weeks
*decent of tests may occur after birth
*undescended happens bc of cancer