development Flashcards
بسم الله الرحمن الرحيم
when where and why the five prominces appear ?
During 4th week
around the stomedum primitve mouth
due to migration of neural crest cells under the ectoderm
they are ?
frontonasal prminince
maxillary prominces
Mandiubular promininces
when and where nasal placode appear ?
nasal or olfactory Placaode appear in the Frontonasal Prominince during 5th week
threre is derpession in the centre of the placode forming olfactory pit also
the Medial and Lateral nasal prominnces
Dorsum from ?
ala from ?
septum from ?
Fronotnasal promnince
lateral nasal prmoionce
medial nsasl prmoonice
when paransalss sinuses development completed
Maxillary > eruption of all teeth
Ethmoid > 8 years
Frontal > 7 years
Sphenoid > 2nd year
when laryngotracehal tube and lung budes appear ?
during 4th week with formation of the nose
will give the Epithelium of the larynx ,trachea , brochial tree and alveoli
splanichinic mesoderm form? connective tissue smooth muscles blood vessels of the respiratory system
epiglottis develop from the ?
copula: median elevation on the floor of pharunx
The laryngeal inlet obliterated ? when
from 8-10 weeks
the laryngeal epitheim developed from
?>
the Endoooooooooooooooderm of the cranial part of laryngotracheal tube \
when ?folds appear and become the true and false vocal cords
during recanalization of the larynx
what happens to caudal end of tracheobrnocail tube ?
gives the right and left lung buds
then
24 dicohtomus divsions
until 8 years
bronchopulmonary sement how formed?
after division of lung bud into the teritary segmental bronchi
the surrounding splaninchi mesoderm is incoroprated bty them formin all contet of bronchopulmonary semgents incuund
segmental artery
inetsemgentral veins etc
invasion of plerua?
each lung grows laterally invading the intraembryonic coeulum the
percardip plriotineal canal
the viscral layer from the splanchnic mesoderm t
the parital layer from the somatic mesoderm
Anomalies of the repisatory tract ?
Esophageal atresia and tracheoesphageal fistula
common arteisa in upper ospeagus and fisulta of lower part ith treaches
casuing impossible feedding and aspiration of milk>polyhydraminos
Surfactant deficicnecy >hyaline membrane disease
RDS
thyroxine and cortisol for treatment
agensis and hypoplasis
ectpoc lung accessory lung
lung cyst congenital
development of diapharagm ?
TLPD
Septum transversum
Lateral body walls
Pleriperitoneal membranes
Dorsal mesentry of esophagus
development of diaphatram how ?>
septum transversum separate heart and live
septume teranversum separate the pericardial and peritonual cavity
the septum trasnvsersum fuse with the pleruroperitoneal membran and the mesentry of esophagus as it grows dorsally
