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11 Cards in this Set
- Front
- Back
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What is the laryngotracheal diverticulum?
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Outgrowth of the ventral wall of the foregut
has an invagination of splanchnic mesoderm in order to form the tracheoesophageal septum. |
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Tracheoesophogeal Septum
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Gives rise to seperation of
laryngotracheal groove esophagus seperation of respiratory epithelium from the gut mesenchymal tissue |
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Laryngotracheal groove
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primitive glottis
arytenoid swellings lies in the midline in between the 4th and 6th arches combines with hypobranchial eminence to form glottis |
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Bronchi
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derived from lung buds
secondary buds define lobe 3 on right 2 on left tertiary buds define bronchopulmonary segments |
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What are the deriviatives of the laryngotracheal tube and lung bud
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endodermal tissues gives rise to
epithelium glands of respiratory system muscle and cartilage comes from splanchnic mesenchymal investment |
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Larynx
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cranial end of laryngotracheal tube
carilages come from neural crest tissue muscles from mesenchyme |
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At which stage in fetal development are their sufficient terminal air sacs to support extrauterine life?
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weeks 25-28
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When is sufficient surfactant production viable for supporting life?
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weeks 28-32
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Describe TE fistula?
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abnormal communication exists between trachea and esophagus
due to incomplete seperation of septa |
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Esophageal Atresia
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esophagus that is not fully patent througout its route
failure of recavitation of endoderm polyhydraminos will exist due to the fetal inability to ingest amniotic fluid |
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TE Fistula w Esophageal Atresia?
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most common malformation of respiratory system
when the fistual exists high in the esophagus ingested material is aspirated when fistula is low often aspiration of stomach contents |
