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