Scrotum and Prostate - Part 3 Flashcards
How much of the periurethral glands comprised of glandular tissue?
1%
Where do the seminal vesicles lay compared to the prostate, bladder of vas deferens? (3)
- Prostate = superior
- Bladder = posterior
- Vas deferens = lateral
Where do the ducts of the seminal vesicles enter?
Central zone
What is formed once the vas deferens joins the seminal vesicles?
Ejaculatory ducts
What do the seminal vesicles do?
Store sperm
What is the surgical capsule?
Connective tissue separating the peripheral and central zones
- surgical boundary line used in transurethral resection procedures
- not a true capsule.
What does the verumontanum divide?
The urethra into proximal and distal segments
What is the region where the ejaculatory ducts enter the urethra?
Verumontanum
Where do the testicular arteries arise from?
The anterior aspect of the abdominal aorta
Where do the testicular arteries course along?
Along the periphery toward the mediastinum testis
What kind of blood resistance is in the testicular arteries?
Low-resistance flow, demonstrating low-flow velocity
- 15 cm/s
Where do the centripetal arteries course?
From the testicular surface toward the mediastinum
- branch in to multiple rami arteries
What kind of blood resistance is in the centripetal arteries?
Low-resistance blood flow, demonstrating low-flow velocity
- 5-20cm/s
Where is the cremasteric and deferential arteries contained?
In the spermatic cord
What do the cremasteric and deferential arteries supply?
Extratesticular structures
What do the cremasteric arteries supply?
Peritesticular tissues
What do the deferential arteries supply? (2)
- Epididymis
2. Vas deferens
What do the cremasteric and deferential arteries connect to?
To the testicular artery that provides flow to the testis
What kind of blood resistance happens in the cremasteric and deferential arteries?
High-resistance blood flow
Where does the left testicular vein empty into?
Into the left renal vein
Where does the right testicular vein empty into?
Directly into the IVC
What is the normal size of the spermatic vein?
1-2mm
When the spermatic cord is dilated what does the diameter exceed?
4mm
Where do the prostaticovesical arteries arise from?
The internal iliac arteries
What are the branches of the prostaticovesical arteries? (2)
- Prostatic arteries
2. Inferior vesical arteries
What does the inferior vesical artery supply? (3)
- Bladder base
- Seminal vesicles
- Ureter
How much blood do the capsular arteries supply to the prostate?
2/3rds
How much blood do the urethral artery supply to the prostate?
1/3rd
What is the size of an adult testis? (L, H, W)
- Length = 3-5cm
- Height = 3cm
- Width = 2-4cm
What is the length of an prepuberty testis?
2-2.5cm
What is the length of an infant testis?
1-1.5cm
