FEMALE REPRODUCTIVE SYSTEM Flashcards
state the 4 principle organs of the female reproductive system?
- ovaries (female gonads)
- uterine/ fallopian tube
- uterus
- vagina
describe the role of the ovaries?
the ovaries are the primary female reproductive organ
- make female gametes (ovum-ova)
- secrete female sex hormones (oestrogen and progesterone)
what makes up the accessory ducts?
- uterine tubes
- uterus
- vagina
what makes up the internal and external genitalia?
internal = ovaries and internal ducts external = external sex organs
what is oogenesis?
- formation of gametes in the ovaries
- occurs monthly in ovarian follicles
how many oocytes are females born with?
- born with 200,000 to 2,000,000 primary oocytes in each ovary
- 40,000 present at puberty
- 400 will mature and ovulate during a woman’s reproductive lifetime
name and describe the ligaments that hold the ovaries in place?
- ovarian = anchors ovary medically to uterus
- suspension = anchors ovary laterally to the pelvic wall
- mesovarium = suspends ovary in between
- broad ligament = contains the suspensory ligament and mesovarium
- blood supply = ovarian arteries and ovarian branch of uterine artery
describe the structure of the ovary?
-covered by fibrous tunica albuginea which is covered by layer of epithelial cells
—called germinal epithelium
-embedded in ovarian cortex are ovarian follicles
—each follicle consists of an immature egg called an oocyte
what are the cells around an oocyte called?
- follicle cells (one layer thick)
- granulosa cells (more than one layer)
what is the graafian follicle?
secondary follicle at its most mature stage that bulges from the surface of the ovary
define ovulation?
ejection of the oocyte from the ripening follicle
-for 20% of woman its associated with mittelschmerz (ovulation pain)
what is the corpus luteum?
ruptured follicle after ovulation
-temporary endocrine structure
describe the movement of an oocyte through the uterine (fallopian) tubes?
- receive the ovulated oocyte and provide a site for fertilisation
- empty into superolateral region of the uterus
- expand distally around ovary forming an area known as ampulla
- uterine tubes have no contact with the ovaries and the ovulated oocyte is cast into the peritoneal cavity
- beating cilia on the fimbriae carry the oocyte in the tube
- non ciliates cells keep the oocyte and the sperm nourished and moist
define the mesosalpinx?
visceral peritoneum that supports the uterine tubes
describe the structure and location of the uterus?
a hollow, thick walled organ located in the pelvis, anterior to the rectum and posterosuperior (in back and above) to the bladder
name and describe the 5 parts of the uterus?
- body = major portion of the uterus
- fundus = rounded region superior to the entrance of the uterine tubes
- isthmus = narrowed region between body and cervix
- cervix = narrow neck which projects into the vagina inferiorly
- cervical canal = cavity of the cervix
which two parts of the female reproductive system does the cervical canal communicate with?
- the vagina, via the external opening of the cervix
- the uterine body, via the internal opening of the cervix
what is the role of cervical glands?
secrete mucus that covers the external opening of the cervix and blocks sperm entry except during midcycle
name and describe the 3 layers of the uterine wall?
- perimetrium = outermost serous layer; the visceral peritoneum
- myometrium = middle layer; interlacing layers of smooth muscle
- endometrium = mucosal lining of the uterine cavity
define endometriosis?
where tissue that acts like the lining of the womb is found in other parts of the body
-such as: ovaries, Fallopian tubes, bladder, bowel
describe 3 features of the endometrium?
-has numerous uterine glands that change in length as the endometrial thickness changes
-stratum functionalis = undergoes cyclical changes i response to ovarian hormones
—shed during menstruation
-stratum basalis = forms a new stratum functionalis after menstruation ends
Describe 5 features of the uterine blood supply?
-highly vascular = uterine arteries arise from internal iliac arteries
—ascend the sides of the uterus and send branches into the uterine wall
-arcuate arteries = branches of uterine arteries in myometrium that give rise to radial branches
-radial branches = descend into endometrium
—give off spiral arteries to the stratum functionalis
—give off straight arteries to the stratum basalis
-degeneration and regeneration of spiral arteries = functionalis sheds during menstruation
-veins of endometrium = thin walled with occasional sinusoids enlargements
describe the structure and function of the vagina?
- thin walled tube between the bladder and the rectum, extending from the cervix to the exterior of the body
- urethra us embedded in the anterior wall
- provides a pathway for birth, menstrual flow and is the organ of copulation (intercourse)
name the 3 layers/coats of the vaginal wall?
- fibroelastic aventitia
- smooth muscle muscularis
- stratified squamous mucosa