Anatomy of the scrotum

Anatomy of the scrotumAnatomical features of the scrotum. Functions of the scrotum. Blood supply and innervation of the scrotum.
~ 5 min

In this note, we will consider the anatomy of the scrotum (scrotum).

Scrotum (scrotum)
Scrotum (scrotum)

The scrotum is the structure of the male reproductive system, in which the testes (or testicles) are located.

The temperature in the scrotum is slightly lower than the body temperature, which is necessary for the normal production of germ cells.

The temperature in the scrotum is slightly lower than the body temperature, which is necessary for the normal production of germ cells.

1. The skin of the scrotum (cutis), which is connected at the two halves of the scrotum and forms a single cavity of sorts. On the surface of the skin in the middle, there is a raphe (raphe scroti), which begins on the inferior surface of the penis and continues along the perineum to the anus.

Skin of the scrotum (cutis)
Skin of the scrotum (cutis)

2. The superficial fascia of scrotum (tunica dartos), which is the muscular layer of the scrotum. There are separate fasciae for each testis.

Fascia of scrotum (tunica dartos)
Fascia of scrotum (tunica dartos)

The right and left superficial fasciae are connected by an intersection in the suture area, forming the septum of the scrotum (septum scroti).

Septum of the scrotum (septum scroti)
Septum of the scrotum (septum scroti)

3. The external spermatic fascia (fascia spermatica externa), which is a continuation of the superficial abdominal fascia.

External spermatic fascia
(fascia spermatica externa)
External spermatic fascia<br />
 (fascia spermatica externa)
External spermatic fascia
(fascia spermatica externa)
External spermatic fascia<br />
 (fascia spermatica externa)

It arises from the border of the superficial inguinal ring and covers the cremaster.

4. The cremasteric fascia (fascia cremasterica). It arises from the fascia of the external oblique abdominal muscle.

Cremasteric fascia (fascia cremasterica)
 Cremasteric fascia (fascia cremasterica)
Cremasteric fascia (fascia cremasterica)
 Cremasteric fascia (fascia cremasterica)

5. The cremaster (m. cremaster). This muscle is a continuation of the fibers of the internal obliqueand transverse abdominal muscles. This muscle pulls the testis up.

Cremaster muscle (m. cremaster)
Cremaster muscle (m. cremaster)
Cremaster muscle (m. cremaster)
Cremaster muscle (m. cremaster)

6. The internal spermatic fascia (fascia spermatica interna), which continues from the transverse abdominal fascia. It also surrounds the spermatic cord.

Internal spermatic fascia (fascia spermatica interna)
Internal spermatic fascia (fascia spermatica interna)
Internal spermatic fascia (fascia spermatica interna)
Internal spermatic fascia (fascia spermatica interna)

7. The tunica vaginalis of the testis (tunica vaginalis testis), which is a continuation of the peritoneum.

Tunica vaginalis of the testis (tunica vaginalis testis)
Tunica vaginalis of the testis (tunica vaginalis testis)
Tunica vaginalis of the testis (tunica vaginalis testis)
Tunica vaginalis of the testis (tunica vaginalis testis)

It consists of the parietal layer (lamina parietalis) and the visceral layer (lamina visceralis).

Parietal layer (lamina parietalis)
Parietal layer (lamina parietalis)
Parietal layer (lamina parietalis)
Parietal layer (lamina parietalis)
Visceral layer (lamina visceralis)
Visceral layer (lamina visceralis)
Visceral layer (lamina visceralis)
Visceral layer (lamina visceralis)

The visceral layer fuses with the tunica albuginea of the testis. Between the layers, there is cavity of the tunica vaginalis (cavum vaginale).

Blood supply

The arterial blood enters the scrotum from the external pudendal, perineal, and cremasteric arteries.

Venous drainage

The venous blood drains into the femoral and internal pudendal veins.

Lymph drainage

The lymph drains into the inguinal lymph nodes.

Innervation

The scrotum is innervated by the branches of the pudendal nerve, from which the posterior scrotal nerves branch, as well as by the ilio-inguinal nerve, which gives rise to the anterior scrotal nerves.

Dictionary

Anatomy of the scrotum

Scrotum
scrotum
Raphe of the scrotum
raphe scroti
Skin of the scrotum
cutis scroti
Superficial fascia of the scrotum
tunica dartos
Septum of the scrotum
septum scroti
External spermatic fascia
fascia spermatica externa
Cremasteric fascia
fascia cremasterica
Cremaster muscle
m. cremaster
Internal spermatic fascia
fascia spermatica interna
Tunica vaginalis of the testis
tunica vaginalis testis
Parietal plate
lamina parietalis
Visceral plate
lamina visceralis
Cavity of the tunica vaginalis
cavum vaginale
Anterior scrotal branches
rr. scrotales anteriores
Posterior scrotal branches
rr. scrotales posteriors
Cremasteric artery
a. cremasterica
Anterior scrotal veins
vv. scrotales anteriores
Posterior scrotal veins
vv. scrotales posteriors
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