山东大学：生殖系统（PPT课件讲稿）The Reproductive System

The Reproductive System SHANDONG UNIVERSITY Liu Zhiyu

The Reproductive System SHANDONG UNIVERSITY Liu Zhiyu

The Reproductive System Composition a Internal genital organ a Gonads(sex glands manufacture the sex cells an secrete the sex hormones o Genital ducts transport the sex cells from the site of production into site fertilization o Accessory glands secrete the fluid External genital organ

The Reproductive System Composition ◼ Internal genital organ ❑ Gonads (sex glands) －manufacture the sex cells an secrete the sex hormones. ❑ Genital ducts － transport the sex cells from the site of production into site fertilization ❑ Accessory glands －secrete the fluid ◼ External genital organ

Male Reprodutive System

Male Reprodutive System

Male Reproductive System Male internal genital organs GG onad -testis ental ducts o Epididymis o Ductus deferens 口 Ejaculatory duct o Male urethra ■ Accessory glands a Seminal vesicle Prostate 口 Bulbourethral gland Male external genital organs Scrotum Penis

Male Reproductive System Male internal genital organs ◼ Gonad –testis ◼ Genital ducts ❑ Epididymis ❑ Ductus deferens ❑ Ejaculatory duct ❑ Male urethra ◼ Accessory glands ❑ Seminal vesicle ❑ Prostate ❑ Bulbourethral gland Male external genital organs ◼ Scrotum ◼ Penis

Male internal genital organs

Male internal genital organs

Gonad- testis General features Paired, smooth, ovoid male reproductive organ, slightly flattened anteroposteriorly Located in scrotum Produces sperm and secretes androgens

Gonad – testis General features ◼ Paired, smooth, ovoid male reproductive organ, slightly flattened anteroposteriorly ◼ Located in scrotum ◼ Produces sperm and secretes androgens

Gonad- testis Structures of testis Tunica albuginea: a tough fibrous coat ao Septula testis: numerous fibrous into the gland Lobules of testis contain the contorted seminiferous tubules Striaght seminiferous tubules Rete testis Efferent ductules of testis open into the head of the epididymis

Gonad – testis Structures of testis ◼ Tunica albuginea : a tough fibrous coat ◼ Septula testis : numerous fibrous into the gland ◼ Lobules of testis : contain the contorted seminiferous tubules ◼ Striaght seminiferous tubules ◼ Rete testis ◼ Efferent ductules of testis open into the head of the epididymis

Testis Seminiferous tubules

Testis Seminiferous tubules

Epididymis Comma-shaped, with head body and tail of epididymis Located on superior extremity and posterolateral aspect of testis Contains tortuous canal that extends from testis to ductus deferens in spermatic cord Function -the site of accumulation and storage of sperm

Epididymis ◼ Comma-shaped, with head, body and tail of epididymis ◼ Located on superior extremity and posterolateral aspect of testis ◼ Contains tortuous canal that extends from testis to ductus deferens in spermatic cord ◼ Function – the site of accumulation and storage of sperm

Ductus deferens a thick-walled muscular tube approximately 45 cm in length It transports sperm form epididymis to ejaculatory duct

Ductus deferens ◼ A thick-walled muscular tube approximately 45 cm in length. ◼ It transports sperm form epididymis to ejaculatory duct