The Male Reproductive System 男性生殖系统

The Male Reproductive System Composion: Internal genital organs Gonad-testes The duct of conveying sperms: includes Accessory glands External genital organs Epididymes 附睾 Ductus deferens 输精管 Ejaculatory duct 射精管 Male urethra 男性尿道 Scrotum 阴囊 Penis 阴茎

internal genital organs内生殖器 (一)Gonad –testis 睾丸 Paired, ovoid organs, Located in scrotum 1.Shape Superior extremity Inferior extremity Anterior borfer Posterior border Medial surface Lateral surface

1.Shape of the testes Superior extremity posterior border Anterior border inferior extremity

(一)testis 睾丸 2. Structure tunica albuginea 白膜, mediastinum testis sends numerous fibrous septules into the gland, dividing it into 100～200 testicular lobules睾丸小叶 that contain 2～4 contorted seminiferous tubules 精曲小管 → traight seminiferous tubules 精直小管 →rete testis 睾丸网

contorted seminiferous tubules straight seminiferous tubules rete testis

1.testis 睾丸 2. Structure Function of epididymis: efferent ducts of testis睾丸输出小管, 12 ～15 in number Function of epididymis: Produces sperm 精子 secrete androgens 睾丸酮

(二) Genital ducts 生殖管道 1. Epididymis 附睾 Shape：Comma-shaped, head of epididymis附睾头 body of epididymis附睾体 tail of epididymis附睾尾 Position：Located on superior extremity and posterior border of testis Function – the site of accumulation and storage of sperm

2. Ductus deferens 输精管 Muscular tube that transports sperm form epididymis to ejaculatory duct Four part: Testicular part 睾丸部 －extends form the tail of epididymis to the superior extremity of testis

2.Ductus deferens 输精管 Spermatic part 精索部 － form superior extremity of testis to the superficial inguinal ring,----- where the vasectomy is performed Inguinal part 腹股沟部 －extends form superficial to deep inguinal rings

2.Ductus deferens 输精管 Pelvic part 盆部 －crosses the ureter to reach the base of bladder, terminal part dilates, -----ampulla ductus deferentis 输精管壶腹

Spermatic cord 精索 Extends from the superior extremity of testis to the deep inguinal ring spermatic cord comprise: Ductus deferens Testicular artery Pampiniform plexus of vein 蔓状静脉丛 Nerves and lymphatic vessels Vestige of vagina process 腹膜鞘突的残余

Spermatic cord 精索 These structures are enclosed by 3 layers of tunic internal spermatic fascia 精索内筋膜, cremaster 提睾肌 external spermatic fascia 精索外筋膜,

3.Ejaculatory duct 射精管 Formed by union of distal portion ductus deferens and excretory duct of seminal vesicle精囊 Passes through the upper part of prostate and opens into the prostatic part of urethra尿道前列腺部 ejaculatory duct

(三) Accessory glands 附属腺体 1.Seminal vesicle 精囊 Paired sacculated, coiled glands Secrete part of seminal fluid Located on posterior surface of bladder, lateral to ampulla ductus deferens seminal vesicle

2.Prostate 前列腺 position Lies behind pubic symphysis, between neck of bladder and urogenital diaphragm 尿生殖膈 Shape Chestnut-shaped organ peostate Base of prostate Apex of prostate Body of peostate Anterior surfaces Posterior surfaces－prostatic sulcus 前列腺沟

2.Prostate 前列腺 Contains of five lobes Anterior lobe Middle lobe Posterior lobe Right and left lobes Capsule of protate前列腺囊 Sheath of protate前列腺鞘 formed by pelvic fascia

3.Bulbourethral gland 尿道球腺 －two small pea-shaped glands, located in the deep transverse muscle of perineum, opens into bulb of urethra 尿道球部 bulbourethral gland

External genital organs 外生殖器 (一) Scrotum 阴囊 Pouch of thin skin lying below the root of the penis Divided into two haves by septum of scrotum, contains testes and epididymis

External genital organs 外生殖器 (一) Scrotum 阴囊 The wall of the testis consist of skin and dartos coat 肉膜, a connective tissue layer that contains many smooth muscle fibers which is contineus anteriorly to the scarpa’s fascia of abdomen and posteriorly with Colles fascia of perineum

The coverings of testis and spermatic cord Parietal peritoneum Transvers fascia Obliquus internus abdominis Trasversus abdominis Aponeurosis of obliquus externus abdominis External spermatic fascia 精索外筋膜 Parietal layer Visceral layer Cremastter 提睾肌 Internal spermatic fascia 精索内筋膜 Vaginal cavity Tunica vaginalis of testis 睾丸鞘膜

(二) Penis 阴茎 division: Consists of root 阴茎根 body 阴茎体 glans penis 阴茎头 Cavernous body of penis 阴茎海绵体: 2 Cavernous body of urethra 尿道海绵体: 1

(二) Penis 阴茎 Skin－thin and loose Prepuce of penis 阴茎包皮 Frenulum of prepuce 包皮系带

(三) Male urethra 男性尿道 Three parts Prostatic part 前列腺部 －lies within the prostate Membranous part 膜部 – lies within the urogenital diaphragm surround by the sphincter of urethra Cavernous part 海绵体部－transverse the all length of cavernous body of urethra

(三) Male urethra 男性尿道 Posterior urethra 后尿道 Anterior urethra 前尿道– prostatic part membranous part Anterior urethra 前尿道– cavernous part

(三) Male urethra 男性尿道 Three constrictions Three enlarged parts internal urethral orifice membranous part external orifice of urethra Three enlarged parts At prostatic part At bulb of urethra At navicular fossa of urethra

(三) Male urethra 男性尿道 Two curvatures Subpubic curvature 耻骨下弯－concave upward Prepubic curvature 耻骨前弯－concave downward

Within prostatic part (三) Male urethra 男性尿道 Urethral ridge 尿道嵴 Seminal colliculus精阜 Prostatic utricle 前列腺小囊 orifices of the ejaculatory ducts

parietal layer visceral layer vaginal cavity 鞘膜腔 gubernaculum of tastis睾丸引带， vagianal process腹膜鞘突 。 vagianal ligament鞘韧带 ， tunica vaginalis of tastis睾丸鞘膜. parietal layer visceral layer vaginal cavity 鞘膜腔

ampulla ductus deferentis 输精管壶腹

Spermatic part 精索部