Reproductive and Genitourinary PDF

Scrotum Layers of the scrotum: Skin Dartos fascia and muscle External spermatic fascia Cremasteric fascia Internal spermatic fascia Tunica vaginalis Tunica albuginea Neurovasculature Arterial supply = anterior scrotal artery (external pudendal artery) and posterior scrotal artery (i...

Scrotum Layers of the scrotum: Skin Dartos fascia and muscle External spermatic fascia Cremasteric fascia Internal spermatic fascia Tunica vaginalis Tunica albuginea Neurovasculature Arterial supply = anterior scrotal artery (external pudendal artery) and posterior scrotal artery (internal pudendal artery) Venous drainage = scrotal veins → external pudendal vein Lymphatic drainage = superficial inguinal nodes Innervation = anterior scrotal nerves (genital branch of genitofemoral + ilioinguinal nerves) and posterior scrotal nerves (perineal branch of pudendal nerve + posterior femoral cutaneous nerve) Spermatic Cord Formed at the opening of the inguinal canal (deep inguinal ring) → inguinal canal → superficial inguinal ring and continues into the scrotum Fascial coverings External spermatic fascia (derived from external oblique m.) Cremasteric muscle and fascia (derived from internal oblique m.) Internal spermatic fascia (derived from transversalis fascia) Contents Vessels: ○ Testicular artery, pampiniform plexus of testicular veins, cremasteric artery and veins, artery to vas deferens Nerves: ○ Genital branch of genitofemoral nerve, ANS Vas deferens Processus vaginalis Lymphatic vessels Histology of Ejaculatory Ducts + Accessory Glands Rete testis Passageway for the exit of sperm from the testis into the epididymis (efferent ductule Epididymis ○ Entrance into the epididymis is via a series of small bridging ducts (efferent ductules) ○ The epididymis is composed of: Ciliated pseudostratified columnar epithelium - becomes cuboidal epithelium in the body and tail (allowing for a larger lumen in these areas) Apical stereocilia (non-motile) - propels sperm Epididymal ducts - fluid reabsorption Peritubular smooth muscle Becomes thicker as the epididymis approaches the vas deferens