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SubjectsAnatomy & PhysiologyThe Human BodyChapter 2 — Vital Organ Systems2.2 Respiratory System

Topic 2.2 · Anatomy & Physiology · Vital Organ Systems

Respiratory System

Air passes through nose → pharynx → larynx → trachea → bronchi → alveoli.

Gas exchange occurs across the alveolar membrane.

Important Facts

Gas exchange site
Alveoli
Main respiratory muscle
Diaphragm

Key Points

  • Normal respiratory rate 12–20/min
  • Oxygen diffuses into capillaries
Exam-Oriented Notes
  • »Alveoli are the functional units of the lungs

Related topics

2.1 Cardiovascular System2.3 Digestive System
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