part ii splanchnology chapter 8 the reproductive system the male reproductive organs the female...
TRANSCRIPT
Part II Splanchnology
Chapter 8
The Reproductive System• The male reproductive organs
• The female reproductive organs
Section 1: The male reproductive organs
I . The general introduction: 2 parts
Internal Genital Organs:
gonad--- testis,
ducts --- epididymis,
ductus deferens
ejaculatory ducts
urethra
accessory glands---seminal vesicle
prostate
bulbourethral glands
External genital organs: scrotum,
penis
Ⅱ. The testis: The features of testes---
Paired oval-shaped organs
They are in the scrotum
(crypartt)
2 extremities,
2 surfaces,
2 borders:
Posterior border— (mesorchial border)
connected with the epididymis
Anterior border---
Ⅱ. The testis: The structure of testes:
12~13 efferent ductules of testis
tunica albuginea
mediastinum testis--- rete testis
septula testis
lobules of testis ---- (100-200) straight seminiferous tubules interstitial tissue of testis (secretes sexual hormones) convoluted seminiferous tubules ( produce sperms)
Ⅲ. The Epididymis:
Position: in the scrotum, attached to the posterior border
of the testis
External feature: 3 parts---
head,
body,
tail
Ⅲ. The Epididymis:
Structure:
efferent ductules (head)
a coiled duct of epididymis
(body, tail)
ductus deferens
Ⅳ. The ductus deferens: Four parts: the testicular part, the funicular (spermatic) part, inguinal part, pelvic part: longest part
----- ampulla ductus deferentis
Spermatic cord: ---soft round rope ---upper extremity of the testis → deep ring of inguinal canal ---main structure : ductus deferense, testicular artery pampiniform plexus of vein nervous plexus lymphatic vessels remnants of vaginal process ---three tunics : external spermatic fascia cremaster internal spermatic fascia
external spermatic fascia
cremaster
internal spermatic fascia
Ⅴ.The Ejaculatory duct: Formation: It’s formed by the union of the end portion of the
ductus deferens and the seminal vesicle duct. Position: It penetrated the base of the prostate, and opened into
the prostatic portion of urethra.
Ⅵ. The male urethra: it’s 15~20cm in length Three parts
The prostatic portion The membranous portion The cavernous portion
Three constrictions The internal orifice The membranous portion The external orifice
The three dilations The prostatic portion The bulbar portion of urethra The navicular fossa
The two curvatures The subpubic curvature The prepubic curvature It can be chan
Ⅶ. The prostate: Location---in the lesser pelvic. Between the urinary bladder
and the urogenital diaphragm; in front of the rectum and posterior to the pubic symphysis
Features--- Chestnut-shaped apex , base, anterior surface, posterior surface (a prostatic sulcus) the urethra passed it
Structure: 5 lobes
Ⅷ. The seminal vesicles: oval sacculated organs posterior to the fundus of urinary bladder open to the ejaculatory duct
Ⅸ. The bulbourethral gland
in the urogenital diaphragm
open to the bulbar portion of urethra
Ⅹ.The Scrotum:
2 layers---skin,
dartos (septum)
contents: testis,
epididymis,
spermatic cord
and its coverings
Ⅺ. Penis: External features: 3parts
head (glans) body root
Structures: --- three cavernous bodys: two cavernous bodys of penis one cavernous body of urethra --- albuginea of 3 cavernous bodies --- deep fascia of penis --- superficial fascia --- skin * Prepuce: skin is folded * Frenulum Prepuce