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Respiratory System

The respiratory system facilitates gas exchange, bringing oxygen into the body and expelling carbon dioxide. It includes the airways, lungs, and respiratory muscles that work together for ventilation.

Study the Respiratory System with AI

Scan any structure from the respiratory system and get instant identification with clinical details.

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Key Structures

Nasal cavity and paranasal sinuses

Pharynx (nasopharynx, oropharynx, laryngopharynx)

Larynx and vocal cords

Trachea and bronchial tree

Lungs (lobes and segments)

Pleura (visceral and parietal)

Diaphragm and intercostal muscles

Study Tips

✓Follow air flow from nose to alveoli
✓Learn bronchopulmonary segments for clinical localization
✓Understand the relationship between pleura and lung
✓Study muscles of respiration and their innervation

Clinical Relevance

Respiratory anatomy is essential for intubation, chest tube placement, and interpreting chest imaging. Understanding lung segments helps localize pathology and plan surgical resections.

Respiratory System FAQs

Common questions about the respiratory system

The right lung has 3 lobes (upper, middle, lower) and the left lung has 2 lobes (upper, lower). The left lung is smaller to accommodate the heart.

The diaphragm is the primary muscle of respiration. When it contracts and flattens, it increases thoracic volume, creating negative pressure that draws air into the lungs.