Repro Random Flashcards
found at base of limbs, pattern anteroposterior axis
sonic hedge hog
defect causes holoprosencephaly
SHH
produced at apical ectodermal ridge
dorsal-ventral axis
Wnt-7
stimulates mitosis of underlying mesoderm, produced by ectodermal ridge, lengthens limbs
FGF
involved in segmental organization of embryo in craniocaudal direction
Hox genes
implantation
at day 6
hCG production
bilaminar disc
2 weeks
gastrulation-trilaminar disc
week 3
notochord produces overlying neural plate
extreme susceptibility to teratogens
3-8 weeks
neural tube closes week 4
4 limbs and 4 heart chambers
week 4
fetal movements
week 8
genitalia
week 10
derivative surface ectoderm
lens, epithelial lining ear, oral, olfactory
canal below pectinate
parotid, sweat, mammory
neural tube
brain, retina, spinal cord
neural crest
PNS, melanocytes, chromaffin cells of adrenal medulla, parafollicualr cells of thyroid, pia, arachnoid, bones of skull, odontoblasts, AP septum, endocardial cushions, myenteric plexus
notochord
nucleus pulposus
mesoderm
muscle, spleen, cardio, lymph, blood, wall of gut, upper vagina, kidneys, adrenal cortex, dermis, testes, ovaries
endoderm
gut tube epithelium, urethra and lower vagina, lungs, liver, gallbladder, pancreas, eustachian tube, thymus, parathyroid, thyroid follicular cells
absent primordial tissue
agenesis
absent despite presence of primordial tissue
aplasia
incomplete organ development
hypoplasia
breakdown normal tissue
disruption
extrinsic disruption
deformation
intrinsic disruption
malformation
renal damage to baby
ACEi
absence of digits
alkylating agents
aplasia cutis congenita
methimazole
bone deformations, fetal hemorrhage, abortion, opthalmologic abnormalities
warfarin
complications maternal diabetes
caudal regression syndrome (anal atresia), heart defects, NT defects, macrosomia, neonatal hypoglycemia
neurotoxicity
methylmercury
excess vitamin A
spontaneous abortions, birth defects-cleft palate, cardiac
x rays
microcephaly, intellectual disability
mechanism fetal alcohol syndrome and most severe form
failure of cell migration
holoprosencephaly and heart-lung fistulas
earlier cleavage monozygotic twins
di/di
monochorionic/diamnionic
mono/mono if after 8-12 days
inner layer chorionic villi
cytotrophoblast
synthesize hormones in fetal placenta
syncytiotrophoblast
safety from immune response in syncytiotrophoblast
no MHC I expression
decidua basalis
derived from endometrium
maternal blood in lacunae
from internal iliac to placenta
umbilical arteries
associations single umbilical artery
congenital and chromosomal anomalies
path umbilical vein
into IVC via liver or ductus venosus
urachus
yolk sac forms allantois that extends into urogenital sinus
becomes urachus
urine discharge from umbilicus
patent urachus
fluid filled cavity lined with uroepithelium
partial failure to obliterate urachus
can lead to infection and adenocarcinoma
outpouching of bladder
vesicourachal diverticulum
connects yolk sac to midgut lumen
vitelline duct
meconium from umbilicus
vitelline fistula
4th aortic arch
proximal portion of R subclavian
location recurrent laryngeal
right under subclavian
left under aortic arch, distal to ductus arteriosus
1st cleft
external auditory meatus
2nd through 4th clefts
temporary cervical sinuses
cyst within lateral neck
anterior to SCM
persistent cervical sinus
micrognathia, glossptosis, cleft palate, airway obstruction
Pierre Robin sequence
neural crest dysfunction leading to mandibular hypoplasia and facial abnormalities
Treacher Collins syndrome
posterior belly digastric
2nd arch
lesser horn hyoid
2nd arch
greater horn hyoid
3rd arch
cartilage of 4th arch
arytenoids, cricoid, corniculate, cuneiform, thyroid
6th arch muscles
all muscles of larynx except cricothyroid (4th)
1st pouch
middle ear, mastoid air cells, eustachian tube
2nd pouch
palatine tonsil lining
dorsal 3rd
inferior parathyroid
ventral 3rd
thymus
final location 3rd pouch
below 4th pouch
dorsal 4th pouch
superior parathyroid
ventral 4th pouch
ultimobranchial body
parafollicular cells of thyroid
failure fusion maxillary and medial nasal
cleft lip
failure lateral or lateral and nasal septum/median palatine shelf
cleft palate
female
paramesonephric duct develops
male formation
SRY to testis forming factor
sertoli in male formation
mullerian inhibitory-suppresses development paramesonephric duct
leydig in male formation
androgens for mesonephric duct formation
male remnant of paramesonephric
appendix testis
lack of uterine development with fully developed 2nd sexual
Mullerian agenesis syndrome
lower vagina
urogenital sinus
mesonephric derivations
seminal vesicles, epididymis, ejaculatory duct, ductus deferens
remnant mesonephric in female
Gartner duct
no sertoli cells or mullerian inhib
both internal
male external
5 alpha reductase def
male internal
ambiguous external until puberty
leydig
leads to male
sertoli
shuts down female (internal) sexual differentiation
incomplete fusion of septum
septate uterus
incomplete fusion mullerian ducts
bicornuate uterus
uterus didelphys
complete failure of fusion
pregnancy possible
double uterus, cervix, vagina
genital tubercle
glans penis, corpus cavernosum/spongiosum
glans clitoris, vestibular bulbs
urogenital sinus
bartholin, skene, cowper, prostate
urogential folds
ventral shaft of penis and labia minor
labioscrotal swelling
labia majora and scrotum
failure of urethral folds to fuse
hypo
below (ventral surface)
associations hypospadias
inguinal hernia and cryptorchidism
faulty genital tubercle
epispadias
on dorsal surface
gubernaculum
anchors testes in males
ovarian ligament+round ligament of uterus in females
processus vaginalis
tunica vaginalis in males
obliterated in females
draining ovaries/testes
para-aortic lymph nodes
body of uterus/cervix/superior bladder
external iliac nodes
prostate/cervix/corpus cavernosum/proximal vagina
internal iliac nodes