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33 Cards in this Set
- Front
- Back
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From what does the respiratory diverticulum form?
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From the laryngotracheal groove
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From where does the laryngotracheal groove form?
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From the ventral wall of the primitive pharynx (Caudal portion)
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From what does the epithelium and glands of the respiratory tract arise?
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Endoderm
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From what does the CT, cartilage and SM of the RT develop from?
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Splanchnic mesenchyme of the foregut
EXCEPTION: Laryngeal cartilage develops from neural crest mesenchyme |
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From what does laryngeal cartilage develop from?
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Neural crest mesenchyme
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Plays a significant role in the separation of the esophagus and developing respiratory system
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Tracheoesophageal septum
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What form the tracheoesophageal septum?
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Tracheoesophageal folds
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The epithelial lining of the larynx is derived from what?
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endoderm of the foregut
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Laryngeal cartilage is derived from which pharyngeal arches?
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4th and 6th (which developed from mesenchyme derived from NC cells)
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Laryngeal skeletal muscle develops from what?
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myoblasts in the 4th and 6th pharyngeal arches
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Sensory to larynx
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Superior laryngeal nerve
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Motor to larynx
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Recurrent laryngeal
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Most common anomaly of the lower RT
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Tracheoesophageal fistula
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Frequently associated with esophageal atresia
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Tracheoesophageal fistula
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Responsible for tracheoesophageal fistula
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Malformation of the tracheoesophageal folds and septum
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Polyhydramnios may be present in this condition
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Tracheoesophageal fistula
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The entire respiratory system develops from what?
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The respiratory diverticulum
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The primary bronchial buds grow into what?
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pericardioperitoneal canal
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Visceral pleura of the bronchi and lungs is derived from what?
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splanchnic mesoderm
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Parietal pleura is derived from what?
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somatic mesoderm
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What is Azygos lobe?
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When part of the superior lobe of R lung grows medial to the azygos vein instead of lateral to it
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Agenesis of the lung is due to what?
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Failure of bronchial bud to develop
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Usually associated with a congenital diaphragmatic hernia
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Lung hyoplasia
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Pulmonary hypoplasia and bilateral renal agenesis
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Potters syndrome
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Name 2 causes of Lung hypoplasia
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Oligohydraminos and Congenital diaphragmatic hernia (most common)
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Name a CAUSE of oligohydraminos
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Bilateral renal agenesis
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Respiration is possible at which stage of lung development?
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Canicular period (16-24 weeks) because alveoli are present
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Honeycomb lung appearance due to dilation of terminal bronchioles
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Congenital lung cysts
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respiratory distress syndrome may result from this
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Hyaline membrane disease
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What is the deficiency in hyalinemembrane disease?
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Deficiency of surfactant and injury to the alveolar wall resulting in protein-rich fibrin-rich exudate
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What would a stillborn infant lung do in water?
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Sink in water as they contain fluid, not air
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Stimulates lung development and the production of surfactant
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Thyroxine
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Administered during pregnancy to accelerate fetal lung development
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Glucocorticoids (Beta Methasone)
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