Content: 0:00 Introduction 0:25 Internal Genital Organs 0:45 Testis 6:50 Epididymis 8:54 Coverings and Fixation of Testes and Epididymis 11:44 Spermatic Cord 14:08 Ductus Deferens 15:40 Seminal Gland 16:26 Prostate 19:16 Bulbourethral Glands 19:47 Male Urethra 20:45 Penis 26:55 Scrotum.

Male Genital Organs (Organa genitalia masculina) – Internal Genital Organs – External Genital Organs Internal Genital Organs Testis – Male reproductive gland – Leydig Cells (produce testosterone) – Sertoli Cells (Structural support and support spermatogenesis) – Prenatal Development: ○ Originate in lumbar region ○ Decend and take the abdominal layers with it to form the scrotal layers – External Structures of Testis ○ Upper pole (Extremitas Superior) ○ Lower Pole (Extremitas Inferior) ○ Anterior Border (Margo Anterior) ○ Posterior Border (Margo Posterior) ○ Lateral Surface (facies lateralis) ○ Medial Surface (Facies Medialis) – Internal Structures of Testis ○ Tunica Albuginea ○ Vascular Layer (Tunica Vasculosa) ○ Septa of Testis (septula testis) ○ Lobules of testis (lobuli testis) ○ Convoluted seminiferous tubules (tubuli seminiferi contori) ○ Straight Tubules (tubuli seminiferi recti) ○ Rete Testis ○ Efferent Ductules (ductuli efferentes testis) Epididymis – Composed of tightly packed tubes – Serves as a reservoir of spermatozoa – Head of Epididymis (Caput epindidymidis) – Body of Epididymis (corpus epididymidis) – Tail of Epididymis (cauda epididymidis) – Sinus of epididymis (sinus epididymidis) Coverings and External Fixation of Testes and Epididymis – Tunica Vaginalis (tunica vaginalis testis) ○ Visceral Layer (Lamina visceralis/epiorchium) ○ Parietal Layer (Lamina parietalis/periorchium) – Internal Spermatic Fascia (fascia spermatica interna) – Cremaster – External Spermatic Fascia (Fascia spermatica externa) – Dartos Fascia (tunica dartos) Spermatic Cord (Funiculus Spermaticus) – Ductus Deferens – Artery to ductus deferens (arteria ductus deferentis) – Testicular Artery – Lymph vessels – Pampiniform plexus (plexus pampiniformis) – Testicular plexus (plexus testicularis) – Deferential plexus (plexus deferentialis) Ductus Deferens – Scrotal Part (pars scrotalis) – Funicular Part (pars funicularis) – Inguinal Part (pars inguinalis) – Pelvic Part (pars pelvica) – Ampulla of ductus deferens (ampulla ductus deferentis) Seminal Gland (glandula vesiculosa) – Simple tubular gland. Produces ejaculate fluid – Excretory duct (ductus excretorius) – Fuse with ductus deferens to form ejaculatory duct (ductus ejaculatorius) Prostate (prostata) – Base of prostate (basis prostatae) – Apex of Prostate (apex prostatae) – Posterior Surface (facies posterior) – Anterior Surface (facies anterior) – Prostatic Urethra (pars prostatica urethrae) – Histological Zones ○ Peripheral Zone (Zona peripheralis) ○ Central Zone (zona centralis) ○ Transitional Zone (zona transitionis) ○ Anterior fibromuscular stroma – Posterior Surface ○ Prostatic Ductules (ductuli prostatici) ○ Urethral Crest (crista urethralis) ○ Seminal Colliculus (colliculus seminalis) ○ Prostatic Utricle (Fetus) (utriculus prostaticus) ○ Openings of the ejsaculatory ducts Bulbo-urethral glands (glandulae bulbourethrales) – Empties into beginning of spongious urethra Male urethra (urethra masculina) – Prostatic Urethra – Membranous Urethra – Spongy Urethra External Genital Organs Penis – External Structures ○ Root of Penis (Radix Penis) § Bulb of penis (bulbus penis) § Crura of penis (crura penis) ○ Body of penis (corpus penis) § Corpora Cavernosa Penis § Corpus Spongiosum penis § Dorsum of penis (facies dorsalis penis) § Urethral Surface (facues urethralis) § Fundiform ligament of penis (ligamentum fundiforme penis) § Suspensory ligament of penis (ligamentum suspensorium penis) § Raphe of penis ○ Glans penis § Corona of Glans § Neck of Glans (collum glandis) § Foreskin / Prepuce (preputium) § Frenulum § Preputial glands / Tyson’s glands (glandulae preputiales) produces smegma – Internal Surface of Penis ○ Corpora Cavernosa Penis ○ Corpus Spngiosum Penis ○ Tunica Albuginea ○ Deep fascia of penis / Buck’ fascia (fascia penis profunda) ○ Superficial fascia of penis (fascia penis superficialis) Scrotum – Tunica Vaginalis – Internal Spermatic Fascia – Cremaster – External Spermatic Fascia – Dartos Fascia – Skin Sources: – Complete Anatomy by 3d4medical – Biorender – Memorix Anatomy 2nd Edition by Hudák Radovan (Author), Kachlík David (Author), Volný Ondřej (Author) – Snell, Richard S. (2012). Clinical anatomy by regions (9th) – University notes and lectures