Chapter 23: The Scrotum

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1

centripetal artery

terminal intratesticular artery arising from the capsular arteries

2

cremasteric artery

small artery arising from the inferior epigastric artery (a branch of the external iliac artery), which supplies the peritesticular tissue, including the cremasteric muscle

3

cremasteric muscle

an extension of the internal oblique muscle that descends to the testis with the spermatic cord; contraction of the cremasteric muscle shortens the spermatic cord and elevates the testis

4

cryptorchidism

also called undescended testes; testicles remain within the abdomen or groin and fail to descend into the scrotal sac

5

deferential artery

arises from the vesicle artery (a branch of the internal iliac artery) and supplies the vas deferens and epididymis

6

ejaculatory ducts

connect the seminal vesicle and the vas deferens to the urethra at the verumontanum

7

epididymal cyst

cyst filled with clear, serous fluid located in the epididymis

8

epididymis

anatomic structure formed by the network of ducts leaving the mediastinum testis that combine into a single, convoluted epididymal tubule; located on the posterolateral aspect of the testis; the epididymis consists of the head, the body, and the tail; spermatozoa mature and accumulate within the epididymis

9

epididymitis

inflammation of the epididymis

10

hematocele

blood located between the visceral and parietal layers of the tunica vaginalis

11

hydrocele

fluid formed between the visceral and parietal layers of the tunica vaginalis

12

mediastinum testis

central linear structure formed by the convergence of multiple thin septations within the testicle; the septations are invaginations of the tunica albuginea

13

pampiniform plexus

plexus of veins in the spermatic cord that drain into the right and left testicular veins; when a varicocele is present, dilation and tortuosity may develop

14

pudendal artery

the internal and external pudendal arteries partially supply the scrotal wall and epididymis and occasionally the lower pole of the testis

15

pyocele

pus located between the visceral and parietal layers of the tunica vaginalis

16

recurrent rami

terminal ends of the centripetal (intratesticular) arteries that curve backward toward the capsule

17

rete testis

network of channels formed by the convergence of the straight seminiferous tubules in the mediastinum testis; these channels drain into the head of the epididymis

18

scrotum

sac containing the testes and epididymis

19

seminal vesicles

reservoirs for sperm located posterior to the bladder

20

septa testis

multiple septa formed from the tunica albuginea that course toward the mediastinum testis and separate the testicle into lobules

21

spermatic cord

structure made up of vas deferens, testicular artery, cremasteric artery, and pampiniform plexus that suspends the testis in the scrotum

22

spermatocele

cyst in the vas deferens containing sperm

23

testicle

male gonad that produces hormones that induce masculine features and spermatozoa

24

testicular artery

artery arising from the aorta just distal to each renal artery; it divides into two major branches, supplying the testis medially and laterally

25

testicular vein

the pampiniform plexus forms each testicular vein; the right testicular vein drains directly into the inferior vena cava, whereas the left testicular vein drains into the left renal vein

26

tunica albuginea

inner fibrous membrane surrounding the testicle

27

tunica vaginalis

membrane consisting of a visceral layer (adherent to the testis) and a parietal layer (adherent to the scrotum) lining the inner wall of the scrotum; a potential space between these layers is where hydroceles may develop

28

urethra

small membranous canal that extends from the bladder to the end of the penis

29

varicocele

dilated veins in the pampiniform plexus caused by obstruction of the venous return from the testicle

30

vas deferens

tube that connects the epididymis to the seminal vesicle

31

verumontanum

junction of the ejaculatory ducts with the urethra