Atlas of Human Anatomy by Netter

Vessels and nerves

Male External Genitalia

[Plate 367, Scrotum and Contents]

Scrotum

Sac derived from skin and superficial fascia of abdominal wall

Contains testes, epididymis and distal portion spermatic cord

Skin shows midline scrotal raphe = fusion of bilateral labioscrotal swellings in embryo

Dartos fascia

Continuation of deep membranous layer of superficial fascia of abdomen

Contains significant smooth muscle = dartos muscle

Extends inward, forming scrotal septum, separating right and left halves

Deep to dartos, tunics of spermatic cord (external spermatic, cremasteric and internal spermatic fascia form a fused layer around and

external to tunica vaginalis

Supplied by external pudendal arteries and veins

Lymphatics drain to superficial inguinal lymph nodes

Innervated by

Anteriorly, ilioinguinal nerve and genital branch of genitofemoral

Posteriorly, posterior scrotal nerves (terminal branches of the pudendal) and perineal branches of the posterior femoral cutaneous

nerves

Penis
page 192
page 193

Male organ of copulation

Composed of a body (shaft), root and glans

Body is

Anchored in superficial perineal space (pouch) and attached to perineal membrane

Contains three cylindrical masses of erectile tissue

a. paired corpora cavernosa in parallel on dorsal surface