Table of Contents
Definition / general | Embryology | Diagrams / tables | Anatomic layers | Drawings | Clinical images | Microscopic (histologic) imagesCite this page: Chaux A, Cubilla AL. Anatomy & histology-scrotum. PathologyOutlines.com website. https://www.pathologyoutlines.com/topic/penscrotumscrotumnormal.html. Accessed December 2nd, 2024.
Definition / general
- Cutaneous fibromuscular sac containing testes, epididymis and distal spermatic cord
Embryology
- Derives from genital swellings or labioscrotal folds which enlarge and fuse in midline to form scrotal sac
- Formation is mediated by 5 alpha dihydrotestosterone
Diagrams / tables
Anatomic layers
- Skin: thin, corrugated and pigmented; includes keratinized squamous epithelium with skin adnexae, dermis and scattered adipocytes but no subcutaneous tissue; divided in half by a midline cutaneous raphe, which continues to inferior penile surface and along perineum to anus
- Dartos muscular layer: two coherent plexuses of smooth muscle cells; contracts in cold or during sexual stimulation
- External spermatic fascia (intercrural layer of Colles fascia): continuation of external oblique aponeurosis
- Cremasteric muscle (cremasteric layer of Colles fascia): bundles of skeletal muscle, continuation of internal oblique muscle
- Internal spermatic fascia (infundibuliform layer of Colles fascia): partitioned in the midline, continuation of transversalis fascia, attached to tunica vaginalis
- Parietal layer of tunica vaginalis
Clinical images