Reproductive Flashcards
Shh genes in develoment
AP axis and polarizing activity
Wnt-7 in development
doral ventral paterning (from apical ectoderm)
FGF in developmnet
mesoderm proliferation to lengthen limbs (from apical ectoderm)
Hox in development
segmentation of embryo
when does hCG secretion begin?
within 1 week of development as the blastocyst implants
what week is gastrualtion?
3
kidney origin
mesoderm
parafollicular C cells of thyroid lineage?
neural crest
sex organ origins
mesoderm
adrenal chromaffin cells origin
neural crest
nucleus pulposus of disc origin
notochord
Mesodermal defects
VACTERL: Vertebral defects, Anal atresia, Cardiac defects, TracheoEsophageal fistula, Renal defects, Limb defects
blood cell origin
mesoderm
Agenesis vs Aplasia
Agenesis is due to lack of primordial tissue.
When is the fetus most suseptible to teratogens?
week 3-8
Teratogen: ACE inhib (1)
renal damage
Teratogen: Alkylating agents (1)
absecnce of digits
aorticopulmonary septum origin
neural crest
melanocyte embryonic lineage
neural crest
Teratogen: aminoglycoside (1)
CN 8 tox
Teratogen: carbamazepine (4)
Also fetal hydratoin syndrome: neural tube defects, craniofacial defects, fingernail hypoplasia, growth restriction
Teratogen: Diethylstibestol (2)
vaginal clear cell adenocarcinoma, mullerian anomalies
Teratogen: Lithium (1)
Ebstein’s anomaly (atrialized right ventricle) (Dr. Epstien has no heart)
Teratogen: Phenytoin (1…thing)
Fetal hydantoin syndrome: microcephaly, dysmorphic craniofacial features, hypoplasic nails, cardiac defects, growth retardation, retardation
Teratogen: Tetracyclines (1)
discolored teeth
Teratogen: Thalidomide (1)
FLIPPER LIMBS.
Teratogen: Valproate (1)
This inhibits folate uptake. Neural tube defects
Teratogen: Warfarin (4)
bone deformities, fetal hemorage, abortion, ophthalmoloigcal abnormalities
Leading cause of birth defects?
alcohol
Teratogen: cocaine (3)
fetal addiction, ab development, placenta abruptio
Teratogen: Smoking (4)
preterm labour, placental problems, ADHD, growth retardation
Teratogen: Iodine (1)
congential goiter aka hypothyroidism aka cretinism
Teratogen: Maternal diabetes (3)
caudal regression syndrome (anal atresia to sirenomelia LOOKS LIKE A MERMAID), congenital heart defects, neural tube defects
Teratogen: vitamin A excess (2)
spontaneous abortion and defects
Teratogen: X-rays (2)
microcephaly, mental retardation
Fetal alcohol syndrome
leading cause of congential defects: mental retardation, development retardation, microcephaly, holoprosencephaly, facial abnormalities, limb dislocations, heart/lung fistulas
What secretes hCG?
syncytiotrophoblast
umbilical vessels derive from?
allantois
umbilical vessels: number, connect, and oxygenation
two arteries which deliever deoxygenated blood from fetal internal iliac arteries.
one vein which brings oxygenated blood from placenta to IVC via ductus venosus
what is the urachal duct?
3rd week yolk sac becomes allantois becomes urachus which is a duct between yolk sac and bladder
patent urachus
urine discharge from umbiliicus
vesicourachal diverticulum
outpouching of bladder
vitelline duct function and destiny
7th week this duct which connects yolk sac to midgut lumen is obliterated
vitelline fistula
meconium discharge from umbilicus
meckel’s diverticulum
part of vitelline duct persists to from true diverticulum of ileum. often has gastric mucosa
what does the aortic arches become?
arterial system only
1st aortic arch
part of maxilliary artery (branch of exernal carotid)
2nd aortic arch
Stapedial artery and hyoid artery (Second = Stapedial)
3rd aortic arch
3 = C. Common Carotid, and proximal part of interal Carotid artery
4th aortic arch
4 limbs (ie systemic). Left: aortic arch. Right: proximal part of right subclavian
6th aortic arch
proximal part of pulmonary arteries and ductus arteriosis (left)
Brachial cleft origin
ectoderm
brachial arch origin
mesoderm and neuro
brachial pouch origin
endoderm
1st brachial cleft
external auditory meatus
2nd - 4th clefts
temporary cervical sinuses. may persists as branchial clet cysts in lateral neck
1st branchial arch cartilage
M’s: Meckel’s cartilage, Mandible, Malleus, incus, sphenoMandibular lig
1st branchial arch muscles
M’s: Muscles of Mastication (temporalis, masseter, lateral/medial pterygoid) Mylohyoid, anterior of digastric, tensor tympani, tensor veli palatini
Brachial Arch Nerves Mnemonic
Chew/V2-3 (1), Smile/7 (2), swallow stylishly/9-stylopharyngeus(3) or simply swallow/10 sup-lary (4) and speak/10-recurrent lar (6)
2nd arch cartilage
S’s: Stapes, Styloid process, lesser horn of hyoid, Stylohyoid ligament
2nd arch muscles
S’s: stapedius, stylohyoid, posterior belly of digastric. (facial expression muscles)
3rd arch cartilage
greater horn of hyoid
3rd arch muscles
styleopharyngeus
congential pharyngocutaneous fistula
fistula between tonsillar area and neck. persistance of 3rd branchial cleft and pouch
4-6th arch cartilage
thyroid, cricoid, arytenoids, corniculate, cuneifrom
4-6th arches muscles
pharyngeal and larynx muscles
what makes posterior 1/3 of tongue?
brachial arches 3 and 4
1st branchial pouch
middle ear/eustachian tube/mastoid air cells
2nd branchial pouch
tonsil epithelium
3rd branchial pouch
thymus and INFERIOR parathyroids
4th branchial pouch
superior parathyroids
DiGeorge syndrome
failure of 3/4 branchial pouches = no t cells and hypocalcemia
MEN 2A
mutation to RET in neuracrest. Pheos, parathyoid tumors (3/4 branchial pouchs), parafollicular cell tumor from NC
cleft lip vs cleft palate etiologies
lip: fusion of maxillary and medial nasal processes
palate: fusion of lateral/medial palatine process, nasal septum
which sex is default?
female
mesonephric duct “wolffian” vs paramesonephric duct “Mullerian”
male vs female GU structures
SRY gene
on Y chrom produces testies determining factor
Sertoli cells secrete _____ and leydig cells secrete ______ which cause
Mullerian inhibitory factor which blocks paramesonephric duct
Androgens which develop mesonephric ducts
Bicornuate uterus
incomplete fusion of paramesonephric ducts. heart shaped uterus
Hypospadia (what is, and cause)
opening of penis inferiorily…. due to failure of urethral folds to close
Epispadia (what is, cause, and association)
opening of penis above. faulty positioning of genital tubercle, bladder exstrophy (outside body)
descent of the testes: gubernaculum and process vaginalis
anchors testes within scrotum and forms tunica vaginals
descent of the ovaries: gubernaculum and process vaginalis
ovarian ligament + round ligament of uterus. obliterated
Venous drainage of gonads
left -> left gonadal vein -> left renal -> IVC
right -> right gonadal -> IVC
(just like adrenal veins)
which gonadal vein has higher pressure and risk
left cause of 90 degree entry point. varicocele more common
ovaries/testicular lymphatic drainage
para aortic nodes
outside of vagina and scrotum lymphatic drainage
superficial inguinal nodes
inside of vagina and utereus lymph nodes
obturator, external iliac and hypogastric nodes
Suspensitory ligament of ovary contains
Ovarian vessels
Cardinal ligament contains
Uterine vessels
Round ligament contains
Artery of Sampson
Broad ligament contains
Ovaries, Fallopian tubes and round ligament
Vagina and ectocervix histology
Stratified squamous
Endocervix histology
Simple columnar
Uterus histology
Simple columnar tubular glands