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21 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Formation of respiratory diverticulum Begins at....... and outgrowth from ....... |
4th week of IUL ventral of foregut |
Appears as an endodermal |
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Endoderm lining RT give rise to .... ,.....
C.T , cartilage & smooth M arised from.... |
— Epith + glands — splanchnic mesoderm surrounds endo |
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How Resp diverticulum separate from foregut..... |
1) Open Esophaguses and trachea septal 2) esophago-tracheal ridges fuse to form septal 3) trachea divide to form lung buds |
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Failure of septum fusion results in |
— Esophago-tracheal fistula — esophageal atresia |
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Abnormal connection between trachea and oesophagus.... |
fistula |
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Closed esophageal end ...results of inability to swallow amniotic fluid by foetus |
atresia |
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A B C ?? |
A. Atresia & fistula B. Atresia C. Fistula |
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orifice communication b/w respiratory diverticulum & foregut — seen during Development of larynx |
Laryngeal orifice |
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Muscles & cartilages — From which arches.... — supplied by X |
—4th & 6th pharyngeal arches —X CN nerve
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superior laryngeal-4th arch recurrent laryngeal-6t |
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Phases of lung development |
Pseudoglandular month (1-4) Canalicular. Mn (4-7) Terminal sac. Mn (7- birth) Alveolar. (Birth-8 years)
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What’s the phase of - terminal bronchioles formed .... - resp bronchiole formed.... - Terminal sacs (primitive alveoli).... - Mature alveoli with well-developed epith-endoth .... |
Pseudoglandular Canalicular Terminal sac Alveolar |
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Phase of SURFACTANT production ... |
— Terminal sac period (27-28 wk) |
+ capillaries establish close contact with sacs to establish blood- air barrier |
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After birth, why size of lungs increase?? |
due to increase in the number of respiratory bronchioles and alveoli , but not due to increase in size of alveoli |
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Which phase . - no gas exchange .... - highly vascular lung tissue... - thin cuboidal epithelial.... - thin Type I epithelial cells.... |
Pseudoglandular Canalicular Terminal sac Alveolar |
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Lungs at birth filled with fluid from ...,... and this fluid cleared at birth |
- amniotic fluid, tracheal glands
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aspiration of amniotic fluid caused by |
Breathing movements |
Fetal breathing movements And amniotic fluid need for lung development |
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Surfactant deficiency results in |
- infant respiratory distress syndrome - hyaline membrane disease |
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In case of Surfactant deficiency What will U give |
exogenous surfactant glucocorticoids |
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pleural cavities formed by |
- intraembryonic coelom - pericardio-peritoneal canals |
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Visceral pleura covered by... but parietal pleura covered by .... |
Splanchnic mesodermal Splanchnic mesodermal |
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pulmonary arteries Develop from which arch ?? |
6th aortic arch (pulmonary arch) |
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