Flashcards in 156, 157. Anatomy of the male reproductive system Deck (18):
What are the 3 types of accessory glands of the male reproductive system and how many of each are present?
1. Bulbourethral gland - 2
2. Prostate gland - 1
3. Seminal vesicles - 2
List the layers of the scrotum, from skin to inner spermatic fascia
External spermatic fascia
Inner spermatic fascia
What are the layers of the scrotum derived from?
Layers of the abdominal wall
What type of muscle is the cremasteric muscle and what is its role?
Deep to dermis
Runs in spermatic cord
Contracts to raise the testis in cold weather
What type of muscle is the dartos muscle and what is its role?
Smooth muscle in the dermis
Contraction causes wrinkling of the scrotal skin
What is the tunica vaginalis and what can arise from excess fluid present in it?
Is a closed sac of peritoneum which covers the testes
Consists of parietal and visceral layers
Contains thin film of peritoneal fluid
Excess fluid causes hydrocoele
Outline the flow of sperm, starting from the seminiferous tubules
Rete testis (form networks)
What type of epithelium lines the epididymis and how does this relate to its function?
pseudostratified columnar epithelium with stereocilia (like long microvilli)
Stereocilia increase the area for absorption from fluid
Can monitor and adjust the fluid composition
For the testes, name the:
a) blood supply
b) venous drainage
c) lymphatic drainage
a) testicular artery
b) paminiform plexus -> testicular vein -> IVC on right side, left renal vein on left side
c) Para-aortic nodes
Name the lymphatic drainage of the scrotum
What muscle composes the ductus deferens and what type of contraction does it do?
Smooth muscle, peristalsis on emission
How long is the ductus deferens?
Outline where the ductus deferens runs
Runs in spermatic cord, through inguinal canal
Lies on side wall of pelvis
Turns medially to meet base of bladder (also attaches to seminal vesicles at end/ampulla region)
Anatomically, what are the seminal vesicles?
Outpouchings of the ductus deferens
What are the secretions of the seminal vesicles and their roles?
Alkaline viscous fluid - neutralise the acidic environment in the female tract
Fructose - Used for spermatic ATP production
Prostaglandins - aid sperm mobility and liability, may also stimulate muscle contraction in the female reproductive tract
For the prostate gland, describe its:
a) shape & position
b) secretions & their role
a) Pyramidal in shape, shape and size like a chestnut
Surrounds the beginning of the urethra and secretes fluid into it via many prostatic ducts
b) Slightly acidic fluid containing citrate - used for sperm ATP production
Acid phosphatase & proteolytic enzymes - liquefies coagulated semen
For the bulbourethral glands, describe:
c) where it opens
b) mucus-like secretion (pre-ejaculate)
c) opens into spongy urethra