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Development of the respiratory system

A detailed illustration of the human respiratory system development stages, showing lung lobes, bronchial tree, and tracheoesophageal fistula anatomy.

Exploring the Development of the Respiratory System

Test your knowledge on the intricate process of respiratory system development with our comprehensive quiz! This quiz covers various stages of lung development, important terminologies, and critical differences between pulmonary conditions.

Assess your understanding of lung lobes development.
Learn about pulmonary agenesis and aplasia.
Discover the stages of respiratory system development and the implications of tracheoesophageal fistula.

5 Questions1 MinutesCreated by UnderstandingLung456

Lung development

Cranial lung lobes develops earlier/faster than caudal lung lobes

Caudal lung lobes develops earlier/faster than cranial lung lobes

Primary bronchus buds appear at the beginning of the fifth week of prenatal development

Some of the bronchial tree branching is made after birth

Caudal lung lobes develop slower than cranial lung lobes

Development of respiratory system

Ventral part of foregut develops into respiratory diverticulum

Dorsal part of foregut develops into respiratory diverticulum

Starts at about the forth week of prenatal life

Primary bronchus buds appears at the beginning of the fifth week of prenatal development

During the development the respiratory diverticulum is separated from foregut by tracheoesophageal septum

Cranial lung lobes develop earlier/faster than caudal

Dorsal ventricular position of alimentary and respiratory tract is because of mitogens (retinoids) concentration

Respiratory diverticulum starts to develop due to the influence of mesenchymal factors like FGFs

Pulmonary agenesis vs pulmonary aplasia

Pulmonary agenesis is because of a lack of bronchial tree

Pulmonary agenesis is because of a lack of bronchial parenchyma

Pulmonary agenesis is a result in lack of bronchi and lung

Pulmonary agenesis is often caused by EFE-10 gene mutation

Pulmonary aplasia is because of a lack of lung parenchyma

Pulmonary agenesis is often caused by FGF-10 gene mutation

Stages of respiratory system development

The respiration of fetus is possible during canalicular phase

Secondary septa is thinner than within the primary septa

The primary septa is thicker than secondary alveolar septa

The alveolar stage is the last stage

Alveolar stage begins at about 32 weeks of pregnancy

During the pseudoglandular stage the conducting portion of the lungs is fully developed

Alveolar stage finishes during the first years of prenatal life

Tracheoesophageal fistula (TEF)

Is often accompanied by the esophageal artresia (EA)

Is a result of incomplete seperation of the foregut into digestive and respiratory system

Also reffered to as RDS

Not to be comfused with RDS

Can co-exist with stenosis and atresia of trachea

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