Male Reproductive Anatomy And Histology

Question 1

The layers of the scrotum are easily distinguishable on dissection. T/F?

Answer 1

False

Question 2

What are the layers of the scrotum?

Answer 2

Skin
Dartos fascia
Dartos muscle
External spermatic fascia
Cremaster muscle
Cremasteric fascia
Internal spermatic fascia

Question 3

Which smooth muscle can cause wrinkling of the scrotal skin?

Answer 3

Dartos muscle

Question 4

Which muscle runs in The spermatic cord?

Answer 4

Cremaster muscle

Question 5

Why are the testes extra abdominal?

Answer 5

In order to reduce the temperature of the testes as spermatozoa are extremely sensitive to temperature

Question 6

The testes are suspended at different levels. T/F?

Answer 6

True

Question 7

The tunica vaginalis is a closed sac of peritoneum in the testes. It has a visceral and parietal layer with peritoneal fluid in between. What is the significance of this?

Answer 7

Excess fluid here can cause a hydrocele

Question 8

What type of epithelium lines the epididymus?

Answer 8

Ciliated psuedostratified columnar epithelium

Question 9

What structure do the seminiferous tubules of the testes feed into?

Answer 9

Straight tubules

Question 10

What structure do the straight tubules of the testes feed into?

Answer 10

Rete testis

Question 11

What structure do the rete testis of the testes feed into?

Answer 11

Epididymis

Question 12

What is the blood supply and drainage to the testes?

Answer 12

The testicular artery which runs into the pampniform plexus and drains via the testicular vein to the IVC on the right and the left renal vein on the left

Question 13

Which lymph nodes do the testes and scrotum drain to?

Answer 13

Testes drain to para aortic nodes at the level of the renal vessels
Scrotum drain ps to inguinal nodes

Question 14

What is the ductus deferens?

Answer 14

A thick walled smooth muscle tube which transports spermatozoa from the testes to the beginning of the urethra

Question 15

How long is the ductus deferens?

Answer 15

45cm

Question 16

What are the names of the outpouches of the ductus deferens?

Answer 16

Seminal vesicles

Question 17

What is the function of the seminal vesicles?

Answer 17

Secrete alkaline viscous fluid which helps to neutralise acid in female tract and contains fructose for sperm ATP production and prostaglandins to aid sperm motility and viability

Question 18

What is the function of the prostate?

Answer 18

The prostate secretes a slightly acidic fluid containing citrate which is used by sperm for ATP production and acid phosphatase and proteolytic enzymes to liquify coagulated sperm

Question 19

What are the bulbourethral glands?

Answer 19

Pea sized glands which open into the spongy urethra and produce a mucous like secretion

Question 20

What is the name of the fibrous capsule which surrounds the testes and projects into the testes to form septa which separate the testes into lobules?

Answer 20

Tunica albuginea

Question 21

How many lobules are there in each testes?

Answer 21

200-300

Question 22

Other than the ductus deferens, what structures run in the spermatic cord?

Answer 22

Testicular artery, veins, nerves, lymphatics

Question 23

What is the approximate diameter of the prostate?

Answer 23

3cm

Question 24

How long is the male urethra?

Answer 24

18-20cm

Question 25

What are the parts of the male urethra?

Answer 25

Pre-prostatic Prostatic Membranous Spongy

Question 26

What is the approximate diameter of the bulbourethral glands?

Answer 26

1cm

Question 27

The penis is supply by three arteries which are all branches of the internal pudendal artery. What is the name of these three arteries?

Answer 27

Artery to the bulb of the penis Deep artery of the penis Dorsal artery of the penis

Question 28

Which arteries supply the scrotum?

Answer 28

Superficial and deep external pudendal arteries and branches of the internal pudendal arteries

Question 29

Where do the testicular arteries and the vesicle artery (which supplies the ductus deferens) drain to?

Answer 29

Pampniform plexus

Question 30

What shape are the nuclei of Sertoli cells?

Answer 30

Triangular or oval

Question 31

What are the functions of Sertoli cells?

Answer 31

Form the blood-testis barrier Support and protect spermatogenic cells Mediate the effects of testosterone and FSH Secrete inhibin to regulate spermatogenesis

Question 32

Where in the testes do leydig cells exist?

Answer 32

In the interstitial between the tubules

Question 33

What are the three muscle layers of the ductus deferens?

Answer 33

Inner longitudinal muscle Middle circular muscle Outer longitudinal muscle

Question 34

What type of epithelium lines the ductus deferens?

Answer 34

Pseudostratified columnar epithelium with stereo cilia

Question 35

What are the names of the two areas of erectile tissue in the penis?

Answer 35

Corpus cavernosa

Question 36

What is the name of the structure in the penis in which the urethra is situated?

Answer 36

Corpus spongiosum

Question 37

How does the epithelium of the male urethra change as you move from the prostatic urethra to spongy urethra?

Answer 37

initially urothelium then pseudostratified columnar epithelium then stratified squamous epithelium