The Male Reproductive System Flashcards
List the male external genital organs
- penis
- scrotum
List the male internal genital organs (duct system)
- testes
- epididymides
- ductus deferentes
- seminal glands
- ejaculatory ducts
- prostate
- Cowper glands
Describe the penis
Long shaft or body and an enlarged bulbous shaped tip called the glans which is prolonged by a foreskin called the prepuce.
Attached root called Radix in the perineum and a free pendulous body which is completely covered with skin.
Contains spongy tissues that become turgid and erect when filled with blood.
What are the erectile tissues of the penis ?
- corpus spongiosum : traversed by urethra
- corpora cavernosa : contains most of the blood in the penis
What are the suspensory ligaments of the penis ?
- the fundiform ligament
- the triangular ligament
What are the blood supplies of the penis ?
Three pairs of arteries that are all branches from the internal pudendal artery :
- artery to the bulb
- deep artery of the penis
- dorsal artery of the penis
Mainly the dorsal vein - all the veins return the blood to the internal pudendal vein.
What is the innervation of the penis ?
- pudendal nerves
- perineal nerves
- posterior scrotal and dorsal nerves
- pelvic splanchnic nerves (S2 and S3 nerves)
Define the scrotum ?
Pouch like structures that hang behind the penis.
Houses and protects the testes and spermatic cords and keeps the testis at a temperature of about 2 to 4 degree lower than the body temperature.
What gives its wrinkle appearance to the scrotum ?
The Dartos muscle
What is the role of the cremaster muscle ?
Contracts to pull the scrotum closer to the body for a higher temperature when outside temperature lowers.
What is the raphe ?
The midline between right and left parts of the scrotum
What is the scrotum blood supply ?
Superficial and deep external pudendal arteries branches from the internal pudendal arteries.
External pudendal veins
What is the innervation of the scrotum ?
- ilio inguinal nerve (L1)
- scrotal branches of the perineal nerve (S3)
- posterior femoral cutaneous nerve (S2)
What is the function of the testes ?
Produce sperm and testosterone
What encloses the seminiferous tubules ?
Interstitial cells of Leydig producing testosterone in the presence of luteinizing hormone.
What is the direction of sperm in the testes ?
From the rete testis to the epididymis