Male Genital System (Internal & External) - Anatomy

Content: Introduction: 0:00 Internal Genital Organs: 0:25 Testis: 0:45 Epididymis: 6:50 Coverings and Fixation of Testes and Epididymis: 8:54 Spermatic Cord: 11:44 Ductus Deferens: 14:08 Seminal Gland: 15:40 Prostate: 16:26 Bulbourethral Glands: 19:16 Male Urethra: 19:47 Penis: 20:45 Scrotum: 26:55 ---------------------------------------------- 📸Follow my new Instagram: @Taimtalksmed ☕Support me at: ----------------------------------------------- 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