Genito Urinary Anatomy Flashcards
what is the ovary homologous to?
testes
what is the round ligament homologous to?
gubernaculum
what is the labia majora homologous to?
scrotum
what is the glans clitoris homologous to?
glans penis
what is the crus of clitoris homologous to?
corpora cavernosa
what 3 areas may kidney stones get stuck?
at the renal pelvis, the brim of the iliopsoas muscle, and the ureter/bladder (ureterovesicular) junction
what can blockage pressure by kidney stones cause?
hydropnephrosis or hydroureter (causes waste accumulation in blood)
hydronephrosis
the dilation (swelling) of one or both kidneys
hydroureter
the distention of the ureter with urine that cannot flow because the ureter is blocked
ureter composition
outer circular layer and inner longitudinal layer, lined by mucous membrane to prevent bacteria from making their way up to kidneys; also allows for easy passage of fluid/substances, induces peristaltic contractions all the time to “milk” the urine from kidneys → bladder
what are the 3 bones of the pelvis?
ilium, ischium, pubis
false pelvis
superior to pelvic brim; hips
true pelvis
surrounded by bone and lies inferior to flaring parts of the ilia; passage for infant at birth in women
pelvic brim (inlet)
separates superior & inferior portions of pelvis
typical gynecoid pelvic inlet
transverse and AP diameter both greater than 10cm
male lumbar spine
only a little lumbar lordosis (inward curvature)
female lumbar spine
lots of lumbar lordosis from L3-L5 (can create issues w/ sciatica)
how do pregnancy and bipedalism alter the lumbar spine?
- in the non-pregnant state the center of mass (COM) is above the femoral head
- the pregnant abdomen will unbalance the pelvis by moving the COM forward if there is no compensation
- the pregnant abdomen does not alter the COM because of the increase in lumbar lordosis
normal uterine position
anteverted + anteflexed; angled forward w/ respect to vagina and flexed forward w/ respect to cervix
rectouterine pouch (pouch of Douglas)
space between rectum and uterus out back
vesicouterine pouch
space between the uterus and the urinary bladder out front
ovaries
female gonads producing egg cells and hormones
uterine (fallopian) tubes
pair of tubes attached to the uterus that provides a passageway for the ovum to move from the ovary to the uterus
fimbriae
finger-like projections at the end of the fallopian tubes that swaff over top of ovarian surface during ovulation to capture egg + bring it down to oviduct
uterus
hollow muscular organ in the pelvic cavity of the female, in which the embryo is nourished and develops before birth
cervix
neck of the uterus
vagina
muscular, elastic passageway that extends from the uterus to the outside of the body
labia minus (labia minora)
inside lips of vagina
labia majora
the larger outer folds of the vulva
suspensory ligament
collection of vessels + nerves supplying ovary (VAN) that runs through ovary not actual ligament
utero-ovarian ligament
band of CT that goes from ovary to margin of uterus to keep it in place
round ligament
band of CT coming from anterior surface of uterus which goes through abdominal muscles and connects to labia majora holding the uterus in place
broad ligament
double layer of parietal peritoneum and covers everything supports uterine tubes, uterus, and vagina
uterosacral ligament
from posterior aspect of uterus to sacrum out back; right around rectum to help fix uterus in place within abdominal cavity
muscles of perineum (female)
help support the pelvic floor and form sphincters at openings of the urethra, vagina and anus; consist mainly of levator ani and deep transverse perineal muscle
levator ani
collection of pubococcygeus, iliococcygeus, ischiococcygeus working together out front and out behind to ensure openings are closed (maintain continence)
deep transverse perineal muscle
supports pelvic organs; helps close off openings for all three holes
histology of the vagina
stratified squamous epithelium, nonkeratinized
- not very good at keeping pathogens out, need mucus, IgA antibodies, commensal bacteria lining vagina
- normal flora: gram -ve bacteria (lactobacillus) — keep pH slightly low in vagina to keep harmful bacteria out (bacterial vaginosis can occur as a result of change in pH)
Transition from vagina to cervix
stratified squamous epithelium (top, dead cells) and bottom layers of simple columnar epithelium
pap smear
examination of cervical cells and mucus at the transition zone for early detection of cervical cancer
- HPV targets living cervical cells (increased risk of developing cervical cancer due to uncontrolled cell growth)
male bladder and surrounding structures
prostate (w/ prostatic urethra), internal urethral sphincter, bulbourethral glands, urethra, ischiocavernous muscle (corpus cavernosum inside), bulbospongiosus muscle (corpus spongiosum inside)
purpose of male internal urethral sphincter
prevent ejaculate from going up into bladder; would also kill sperm
bulbourethral glands
at the base of the penile urethra, secrete alkaline substance that flushes/neutralizes any urine left in urethra (would kill sperm) and also produces slippery mucus to ensure sperm are not stuck to sides when they end up in urethra
seminal vesicles
paired sac-like exocrine glands that secrete most fluid into the vas deferens