GA1. Development of Heart & Lungs Flashcards
The cardiac M. was developed from the ______ tissue
splanchnic mesoderm
myoblast adhere to one another by special attachments that later develop into _______
intercalated disc
The heart begins to develop before the end of the ____ week
third
a pair of _____ fuse together to form the primitive heart tube
endocardial tubes
Name the 5 regions that the heart develops into:
- bulbous cordis
- truncus arteriosus
- sinous venosus (superior)
- ventricles
- atrium (superior)
** The heart is developed in to ventral region beneath the _______
foregut
Contraction of the primitive heart begins by day ___
22
by the 7th week _______ & _____ forms
interatrial septum and interventricular septum
Two structures that give rise to the pulmonary trunk & aorta
bulbous cordis & truncus arteriosus
c.c.__________: consists of pulmonary stenosis, interventricular septal defect, right ventricular hypertrophy, and an overridding aorta
tetralogy of fallot
c.c: _______ ass. with maternal rubella infection; remnant of the left sixth aortc arch
patent ductus arteriosus
The lungs are derived from the ____gut
foregut
The lungs start as _______ (lung bud)
respiratory diverticullum
What is the endodermal linging of the tracheobronchial tree derived from ____?
foregut
The respiratory diverticulum becomes invested by ___ as it elongates
splanchnic mesoderm
______ perid of lung maturation is 6-16 weeks
psuedoglandular period
_____ glands are formed during the psuedoglandular period
exocrine
During the _____ period exocrine glands are formed
pseudoglandular period
By the 16th week all major elements of the lung have formed except thoses involved in ______
gas exchange
_______ period of lung maturation is btw the 16-26th week
canalicular period
_______ period is when the lumina of bronchi and terminal bronchioloes becomes larger and lung tissue bc highly vascular
canalicular period
During the canalicular period what structures become larger
lumina of bronchi and terminal bronchioles
_____ period of lung maturation is 26 weeks to birth
terminal saccular period
______ are primordial alveoli
terminal saccules
Alveolar ducts give rise to _____
terminal saccules
terminal saccular period (26weeks to birth)
What are terminal saccules lined by
type I alveolar cells and type II alveolar cells
_____ period is when sufficient amount of surfactant is produced
terminal saccular period (26 weeks -birth)
______ period of lung maturation is 32 weeks to 8 yrs
alveolar period
During _____ period alveolarcapillary membrane becomes sufficiently thin to allow for gas exchange
Alveolar period
cc______ : defect that enables blood to flow btw the R. and L. atruim
atrial septal defect
cc____: defect where there is a problem in the intraventricle wall
ventricular septal defect
cc____: defect where the aorta narrows where the ductus arteriosus inserts
coarticulation of the aorta
cc. __: tetralogy of fallot defect where there is an obstruction to flow from the RV to the pulmonary art
pulmonary stenosis
cc: _______ : (tetralogy of fallot) defect where the aorta is positioned over a ventricular spetal defect, instead of over the aorta
overridding aorta
