🔬
Foundation Sciences · Embryology
Lung Development Stages
Lung development progresses through embryonic, pseudoglandular, canalicular, saccular and alveolar stages from week 4 to ~8 years of age.
📌 Learning Objectives
- Describe the underlying mechanism of Lung Development Stages.
- Identify the key clinical features and complications of Lung Development Stages.
- Outline the appropriate investigations and management of Lung Development Stages.
- Discuss the implications for patients and families of Lung Development Stages.
📋 Overview
Each stage marks key structural events: branching morphogenesis, formation of respiratory bronchioles and alveoli. Surfactant production begins ~week 24 and is mature by ~35 weeks.
🔬 Basic Science
Each stage marks key structural events: branching morphogenesis, formation of respiratory bronchioles and alveoli. Surfactant production begins ~week 24 and is mature by ~35 weeks.
🏥 Clinical Relevance
Bronchopulmonary dysplasia is a chronic lung disease of prematurity associated with prolonged ventilation.
🧪 Investigations
Investigation depends on clinical context: relevant blood tests, imaging, and specific genetic or histopathological tests as appropriate. Refer to specialist services where indicated.
💊 Management
Management is condition-specific and typically multidisciplinary, combining medical therapy, surgical intervention where appropriate, supportive care, and family/genetic counselling.
Revision Resources – expand the sections below for high-yield notes, exam pearls, key facts and further reading.
MLA High-Yield Notes & Quick Revision ⌄
Common SBA themes: recognising the underlying mechanism, identifying classic clinical features, and choosing the first-line investigation or management step. Watch for inheritance pattern and characteristic associations.
lung development
surfactant
rds
type ii pneumocyte
alveolar stage
- Lung development stages: embryonic, pseudoglandular, canalicular, saccular, alveolar.
- Surfactant (mainly dipalmitoylphosphatidylcholine) is produced by type II pneumocytes.
- Lecithin/sphingomyelin ratio >2 indicates lung maturity.
- Antenatal corticosteroids accelerate fetal lung maturation before preterm delivery.
- Alveolarisation continues until ~8 years of age.
Exam Pearls ⌄
⭐ High Yield
Lung development stages: embryonic, pseudoglandular, canalicular, saccular, alveolar.
Surfactant (mainly dipalmitoylphosphatidylcholine) is produced by type II pneumocytes.
Lecithin/sphingomyelin ratio >2 indicates lung maturity.
Antenatal corticosteroids accelerate fetal lung maturation before preterm delivery.
Alveolarisation continues until ~8 years of age.
💡 Clinical Pearl
Lung Development: Bronchopulmonary dysplasia is a chronic lung disease of prematurity associated with prolonged ventilation.
⚠️ Exam Tip — Common Mistakes
Confusing the mechanism of Lung Development Stages with related conditions.
Missing classic clinical features of Lung Development Stages in SBA stems.
Failing to consider Lung Development Stages in the differential diagnosis.
Key Facts ⌄
Lung development stages: embryonic, pseudoglandular, canalicular, saccular, alveolar.
Surfactant (mainly dipalmitoylphosphatidylcholine) is produced by type II pneumocytes.
Lecithin/sphingomyelin ratio >2 indicates lung maturity.
Antenatal corticosteroids accelerate fetal lung maturation before preterm delivery.
Alveolarisation continues until ~8 years of age.
Related Topics ⌄
References ⌄
- GMC MLA Content Map
- NICE Clinical Knowledge Summaries
- BMJ Best Practice
Further Resources
Medical Portfolio & Career Development
Build a professional portfolio website for applications, audits, teaching, research and career progression.
CVtoWebsite.com →