Reproductive and embryological origin Flashcards
What are the male gonads and what do they do?
testes secrete hormones and produce sperm
what makes up the ductal system?
epididymis ductus deferens ejaculatory ducts penis and urethra
what does the ductal system do?
transport and store sperm, assist in maturation and deliver it in semen to female RT
spermatic cord
contains ductus deference testicular artery and vein and autonomic nerves, lymph vessels and cremaster muscle - surrounded by fascia
what are the male accessory glands?
seminal vesicles prostate bulbourethral glands scrotum
what do the seminal vesicles do?
secrete seminal fluid
what does the prostate do?
secretions that contribute to semen
what does the bulbourethral gland do?
secretions contribute to semen
what does the scrotum do?
supports testes
what can go wrong in the MRS
hydrocele of scrotum scrotal hernia spermatogenesis testicular torsion undescended testis vasectomy for sterilisation infertility impotence congenital malformations spread of infections
what are the female gonads?
ovaries
what do the ovaries do?
produce gametes - oocytes and secrete hormones
what makes up the female reproductive system?
ovaries uterine/ fallopian tubes uterus vagina cervix
what do the uterine tubes do?
transport sperm and oocytes for fertilisation
what does the uterus do?
serves as the pathway for transport of sperm and site of implantation for fertilised ovum
what supports the ovaries, uterine tubes and uterus?
peritoneal folds and ligaments
what does the vagina do?
receives the penis during sex outlet for menstrual flow and passageway for birth
what is the female external genitalia?
vulva/ pudendum
what makes up the vulva?
mons bubis labia majora labia minora clitoris vestibule
what is the vestibule
region between the 2 labia minora
accessory glands in female?
paraurethral glands greater vestibular/ bartholin’s glands bulb of vestibule
clinical context for FRS
oogenesis ovarian cyst/ tumour tubal ligation for sterilisation tubal block in infertility uterine prolapse hysterectomy congenital malformations spread of infections
female version of testes
ovaries
female version of sperm cell
ovum
female version of scrotum
labia majora
female version of spongy urethra
labia minora
female version of intermediate urethra
vestibule
female version of corpus spongiosum penis and bulb of penis
bulb of vestibule
female version of glans penis and corpora cavernosa
clitoris
female version of prostate
paraurethral glands
female version of bulbourethral glands
greater vestibular glands
male version of ovaries
testes
male version of ovum
sperm cell
male version of labia majora
scrotum
male version of labia minora
spongy urethra
male version of vestibule
intermediate urethra
male version of bulb of vestibule
corpus spongiosum penis and bulb of penis
male version of clitoris
glans penis and corpora cavernosa
male version of paraurethral glands
prostate
male version of greater vestibular glands
bulbourethral glands
origin of reproductive system
shared common structural origin with urinary system
what germs layers is the reproductive system generated from?
mesoderm endoderm
what structures do the urogenital systems develop from
mesonephric system cloaca
what is the mesonephric system?
from intermediate mesoderm germ layer
what is the cloaca?
part of the distal portion of embryonic hindgut from the endodermal germ layer
what does the mesonephric system do?
contributes to renal tubules, ureter, reproductive ductal system, uterine canal and vagin
what does the cloaca do?
contributes to the urinary bladder, urethra, vagina and external genitalia
indifferent gonads
located in the posterior abdominal wall as gonadal ridges form a longitudinal urogenital ridge with mesonephros
when do the gonads acquire sexual characteristics?
6th/ 7th week
formation of male gonads
influenced by genes and hormones primitive sex cords form the testis from the 6th-8th week of development
formation of female gonads
influenced by genes and hormones primitive sex cords form ovaries from the 6-8th week of development
what are the 2 pairs of ducts in both male and female embryos?
mesonephric or Wolffian Paramesonephric or Mullerian
what happens in a genetically male embryo?
the paramesonephric ducts degenerate mesonephric ducts form: epididymis ductus deferens seminal vesicle ejaculatory duct
what happens in a genetically female embryo?
mesonephric ducts degenerate the paramesonephric ducts form: uterine tubes uterus cervix of uterus upper part of vagina
how is the uterus formed?
fusion and canalisation of part of the 2 paramesonephric ducts to form uterus contributes to formation of upper vagina
what forms the uterine tubes?
unfused parts of paramesonephric ducts
what forms the vagina?
paramesonephric ducts urogenital sinus of the cloaca
formation of vagina from cloaca?
during 4th-8th week the cloaca divides into the urogenital sinus and anal canal
what does the urogenital sinus form?
urinary bladder urethra prostate gland urethral and paraurethral glands vagina external genitalia
formation of the vagina from urogenital sinus
outgrowth of urogenital sinus - sinovaginal bulbs, fuses with solid caudal tip of paramesonephric duct forms a solid vaginal plate which is canalised
formation of external genitalia
from 3rd - 6th week the male and female are the same
