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The Male Reproductive System
男性生殖系统
Composion: Internal genital organs
Gonad-testes
The duct of conveying sperms: includes
Accessory glands External genital organs
The Male Reproductive System
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
inferior extremity
Anterior border
posterior border
tunica albuginea 白膜 ,
mediastinum testis sends numerous fibrous septules into the gland, dividing it into 1
00 ~ 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
( 一 )testis 睾丸2. Structure
contorted seminiferous tubules
straight seminiferous tubules
rete testis
efferent ducts of testis 睾丸输出小管 , 12 ~ 15 in number
Function of testis: Produces sperm 精子 secrete androgens 睾丸酮
1.testis 睾丸2. Structure
( 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
Four part:
2. Ductus deferens 输精管
Testicular part 睾丸部
- extends form the tail of epididymis to the superior extremity of testis
Muscular tube that transports sperm form epididymis to ejaculatory duct
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, coile
d glands Secrete part of seminal
fluid Located on posterior su
rface 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 Base of prostate
Apex of prostate
Body of peostate
Anterior surfaces
Posterior surfaces - prostatic
sulcus 前列腺沟
peostate
Contains of five lobesAnterior lobe Middle lobePosterior lobe Right and left lobes
2.Prostate 前列腺
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
Aponeurosis of obliquus externus abdominis
Obliquus internus abdominis
Trasversus abdominis
Transvers fasciaParietal peritoneum
External spermatic fascia精索外筋膜
Cremastter 提睾肌
Internal spermatic fascia精索内筋膜
Tunica vaginalis of testis睾丸鞘膜
Parietal layer
Visceral layer
Vaginal cavity
The coverings of testis and spermatic cord
( 二 ) Penis 阴茎 division: root 阴茎根 body 阴茎体 glans penis 阴茎头
• Consists of
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
Posterior urethra 后尿道
prostatic part
membranous part
Anterior urethra 前尿道–
cavernous part
( 三 ) Male urethra 男性尿道
Three constrictions internal urethral orifice membranous part external orifice of urethr
a
Three enlarged parts At prostatic part At bulb of urethra At navicular fossa of uret
hra
( 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
( 三 ) Male urethra 男性尿道
Within prostatic part
Urethral ridge 尿道嵴 Seminal colliculus 精阜
Prostatic utricle 前列腺小囊
orifices of the ejaculatory ducts
( 三 ) Male urethra 男性尿道
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
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