OB BOLD 3 Flashcards
skeletal system forms from the
mesoderm
skeletogenesis is
formation of the skeleton
orgogenesis
placement of mesoderm and development into cartilage and bone
osteoclasts do what
crush bone
what happens in ossification centers
cartilage degenerates and bone replaces it
primary ossifications centers are where
more central (diaphysis)
secondary ossification centres are wher
more peripheral (epiphysis)
when do ossification centres develop
postnatally
what is between epi and diaphysis
metaphysis
what does the metaphysis contain
growth plate
limb buds seen what week on TV
7
clavicle and mandible develop what week
8
primary ossification centers seen what week
11-12
hand and feet visualizeed what week
12-14
fetal movement seen by what week
9-10
foot should be ____ to the tib/fib
perpendicular
femur to foot ratio
1
cardio-thoracic ratio
<0.5
thoracic - abdo circ ratio
> 0.8 after 20 weeos
abdominal components form from the
endodermal and mesodermal tissue
mesoderm forms
kidney and spleen
yolk sack stay connected to primitive gut by
vitelline duct
omphalocele is
when bowel and organs protrude through the umbilical defect –> skin intact
gastroschisis
when bowel loops are outside the abdo wall (no skin covering)
total situs inversus
stoamch and heart on the right
partial situs inversus
stomach on left, heart on right (dextrocardia)
non-visualized stomach =
esophageal atresia
bowel is ____ to liver
isoechoic
doppler flow in the umbilical vein should be
HEPATOPEDAL
point of enterance of cord into abdo
abdominal cord insertion
