《系统解剖学 Systematic Anatomy》课程教学课件（PPT英文讲稿）Part II Splanchnology_Chapter 4 Male Reproductive System_2.5 Male Genital System

Splanchnology(lv)---Reproductive SystemQ

- Reproductive System Splanchnology (Ⅳ)

Formation:Gonad----producegermcell&sexualhormoneInternalgenital organsGenital ducts ---- transport germ cellAccessory glands ---- secrete fluidExternalgenitalorgans---Copulatoryorgan

Formation: Internal genital organs External genital organs Gonad - produce germ cell & sexual hormone Genital ducts - transport germ cell Accessory glands - secrete fluid - Copulatory organ

Male genital organsFormationGonad: testisGenitalducts:epididymis,ductusdeferensInternalgenitalorgansejaculatoryducts,urethraAccessoryglands:prostate,seminal vesicles,bulbourethralglandsExternal genital organs ---- scrotum, penis genital cells --- sperm, to maintain the life of species· sexual hormone --- maintain the 2nd characteristics for male,suchas thelaryngeal prominence is higher, themuscles are stronger,the beard & hairs are highly developed

Formation Internal genital organs External genital organs - scrotum, penis Gonad: testis Genital ducts: epididymis, ductus deferens, ejaculatory ducts, urethra Accessory glands: prostate, seminal vesicles, bulbourethral glands • genital cells - sperm, to maintain the life of species • sexual hormone - maintain the 2nd characteristics for male, such as the laryngeal prominence is higher, the muscles are stronger, the beard & hairs are highly developed. Male genital organs

Section1Internalgenital organsI.The gonad ---testisare suspended in the scrotumScrotum（1)Externalfeaturesoval-shaped organ·2 extremities --superior & inferior2 surfaces--- lateral & medial: 2 borders--- anterior & posteriorRight testis

Section 1 Internal genital organs Ⅰ. The gonad - testis oval-shaped organ • 2 extremities - superior & inferior • 2 surfaces - lateral & medial • 2 borders - anterior & posterior （1）External features • are suspended in the scrotum • Right testis Scrotum

(2) Structures of testis:? Septa testis②Lobulesoftestis③Contortedseminiferoustubules6@ Straightseminiferoustubules3?Retetestis2@Efferentductulesoftestis1?EpididymisDuctusdeferensTunica albuginea

（2）Structures of testis: ① Septa testis ② Lobules of testis ③ Contorted seminiferous tubules ④ Straight seminiferous tubules ⑤ Rete testis ⑥ Efferent ductules of testis ⑦ Epididymis ⑧ Ductus deferens ① ② ③ ④ ⑤ ⑥ ⑦ ⑧ Tunica albuginea

细膜晚期精子细胜早期精子细胞机胞质桥支持细照次级精呼细照初级精母缅脑精康CSpermatozoa毛细血管闻质细脑肌祥国匙基膜Testosteronecontrolsthedevelopmentof malesecondarysexual characteristics

Spermatozoa Testosterone • controls the development of male secondary sexual characteristics

DuctusdeferensThe conveying ductsI.Epididymisstorehouseforspermssecretesemen·comma-shaped① HeadBody2 Tail3

The conveying ducts ① Head ② Body ③ Tail Ⅱ. Epididymis Ductus deferens • storehouse for sperms • secrete semen • comma-shaped ① ② ③

Il.Ductusdeferens: 50cm long, continuous with tail of epididymisD Testicular part --- shortest part② Funicular part --- can be palpated③Inguinal part--- pass through inguinal canal

Ⅲ. Ductus deferens • 50cm long, continuous with tail of epididymis ① Testicular part - shortest part ② Funicular part - can be palpated ③ Inguinal part - pass through inguinal canal ① ② ③

Pelvic partSeminalvesicle·the longestpartVasdeferens·runs alongthe lateral pelvicwall·ampulla --- the terminal dilated portion· joins with the excretory duct of seminalEpididymisvesicletoformtheejaculatoryductTestisAmpulla ductus deferentisSeminalvesicleProstate

Ampulla ductus deferentis ④ Pelvic part • the longest part • runs along the lateral pelvic wall • ampulla - the terminal dilated portion • joins with the excretory duct of seminal vesicle to form the ejaculatory duct Prostate Seminal vesicle

Funicular part can be palpated in the living body is the place where the vasectomy is performed

• can be palpated in the living body • is the place where the vasectomy is performed Funicular part