ANATOMY- The Urethra and Prostate

Question 1

What are the 3 Parts of the MALE URETHRA?

Answer 1

1) PROSTATIC URETHRA

2) MEMBRANEOUS URETHRA

3) SPONGY/ BULBOUS URETHRA

Question 2

What part of the Male Urethra is the WIDEST?

Answer 2

PROSTATIC URETHRA

Question 3

What part of the Male Urethra is the NARROWEST?

Answer 3

MEMBRANEOUS URETHRA

Question 4

Describe the HISTOLOGY of the MALE URETHRA

Answer 4

Prostatic Urethra- TRANSITIONAL EPITHELIUM

Membraneous and Spongy- STRATIFIED COLUMNAR EPITHELIUM

Question 5

Where does the Prostatic Urethra start and end?

Answer 5

Begins at the Bladder neck
Traverses the Prostate
Ends at the External Urethral sphincter

Question 6

What is the COLLICULUS SEMINALIS of the Prostatic Urethra?

Answer 6

Elevation of the Urothelium distal to the ejaculatory ducts

Question 7

COLLICULUS SEMINALIS

Answer 7

Question 8

What are the 3 constrictions of the Male Urethra?

Answer 8

Internal Urethral Sphincter
External Urethral Sphincter
External Urethral Orifice

Question 9

MALE URETHRA

Answer 9

Question 10

What is the Blood supply of the Urethra?

Answer 10

PROSTATIC URETHRA- Inferior Vesical Artery

MEMBRANEOUS URETHRA- Bulbourethral Artery

SPONGY URETHRA- Internal Pudendal Artery

Question 11

Which part of the Urethra is most likely to be injured in PELVIC FRACTURES ?

Answer 11

Membraneous Urethra

Question 12

What is the FUNCTION of the Prostate gland?

Answer 12

Secretes Proteolytic enzymes, which allow ejaculate to remain in a fluid state

Question 13

What is the ARTERIAL BLOOD SUPPLY of the Prostate gland?

Answer 13

Prostatic Artery, Branch of the Internal Iliac Artery

Question 14

What is the VENOUS BLOOD SUPPLY of the Prostate gland?

Answer 14

Prostatic Venous Plexus–> Internal Iliac Vein

BATSON’S VENOUS PLEXUS: Valveless Plexus connecting the prostate with the Vertebral Bodies

Question 15

BATSON’S VENOUS PLEXUS

Answer 15

Question 16

What is the Lymphatic drainage of the Prostate gland?

Answer 16

Internal Iliac Nodes

Question 17

What is the composition of the prostate?

Answer 17

Consists of tubulo-acinar glands in a fibromuscular stroma

Question 18

What are Tubulo-acinar glands?

Answer 18

Describes the shape of the gland- Acinar (Rounded), Tubular (Tube)

Question 19

Where is the capsule of the Prostate found?

Answer 19

Posterior and Lateral aspects of the prostate

Question 20

What is ABSENT in the anterior aspect of the prostate?

Answer 20

Glands

Question 21

What are THREE ZONES of the prostate?

Answer 21

• PERIPHERAL ZONE
  -TRANSITIONAL ZONE
  -CENTRAL ZONE

Question 22

Which zone forms the MAJORITY of the Prostate gland?

Answer 22

PERIPHERAL ZONE (70%)

Question 23

What PATHOLOGY is found in the PERIPHERAL ZONE?

Answer 23

Prostate Cancer

Question 24

Which zone forms the MINORITY of the Prostate Gland?

Answer 24

TRANSITION ZONE (5%)

Question 25

What PATHOLOGY is found in the TRANSITION ZONE?

Answer 25

Benign Prostatic Hyperplasia (BPH)

Question 26

What important structures enter the Prostate gland and which zones are they in?

Answer 26

Urethra- Found in the Transition Zone

Ejaculatory Ducts- Found in the Central zone

Question 27

Zones of the Prostate

Answer 27

Question 28

What is the Fascia of Denonvilliers?

Answer 28

Layer of fascia which separates the prostate from the rectum.

This is the plane used when excising the rectum and separating it from the prostate