
Learn how the respiratory system enables breathing through ventilation—inspiration and expiration—driven by the diaphragm and ribcage, and its collaboration with the cardiovascular system to exchange oxygen and carbon dioxide.
Explore the respiratory tract and the nose's role in cleansing, warming, and moistening air with cilia and mucus. Follow air through the nasal cavities to the nasopharynx.
Explore the pharynx as a funnel-shaped passage for air and food, linking nasal and oral cavities to the larynx and esophagus. Review its three sections: nasopharynx, oropharynx, and laryngopharynx.
Explore the larynx, the voice box that channels air to the trachea, protects the airway during swallowing, and houses the vocal cords to produce sound.
Explore the bronchial tree from the trachea to alveoli, detailing primary and secondary bronchi, bronchioles, and alveoli for air distribution and gas exchange.
Explore the lungs' structure and function, from lobes and lobules to bronchioles and alveoli, and learn how gas exchange brings oxygen into the blood and expels carbon dioxide.
Explore the mechanism of breathing and key respiratory volumes, detailing inspiration and expiration, the diaphragm and ribcage movements, tidal volume, inspiratory and expiratory reserve volumes, vital capacity, and residual volume.
Explore how air moves through the respiratory system during inspiration and expiration, with the rib cage and diaphragm changing thoracic volume, while pleura and pleural fluid enable negative pressure breathing.
Trigger inspiration through the respiratory center in the medulla by contracting the diaphragm and external intercostal muscles, lowering intrapleural pressure to draw air into the lungs.
Explore expiration: when the respiratory center in the medulla oblongata ceases signals to the diaphragm and ribcage, the diaphragm relaxes to a dome shape and air passively exits.
Compare inspiration and expiration, highlighting active diaphragm and intercostal muscle action with thoracic volume increase and air inflow, versus passive expiration with muscle relaxation and air outflow.
Explore internal respiration, the diffusion-driven exchange of oxygen between systemic capillaries and tissue fluid, enabling cellular respiration and energy production.
Explore external respiration, the gas exchange between alveolar air and capillary blood, driven by oxygen and carbon dioxide gradients. See how oxygen diffuses into blood and carbon dioxide into alveoli.
The Human Respiratory System course provides an in-depth understanding of the structure and function of the respiratory system. Beginning with an introduction to the respiratory system, the course explores the anatomy, detailing the organs involved in breathing. The physiology section delves into the mechanisms of breathing, including gas exchange and transport. Students will learn about the regulation of breathing and how the body maintains respiratory homeostasis. The course also covers common respiratory diseases such as asthma, COPD, and pneumonia, highlighting their causes, symptoms, and treatments. Diagnostic tests and procedures, including spirometry and blood gas analysis, will be discussed to equip students with practical skills for respiratory assessment. Finally, the course emphasizes respiratory health promotion, teaching strategies to prevent respiratory diseases and improve lung health.
Interactive lectures, engaging multimedia content, and practical assignments will enhance your learning experience. Quizzes and assessments will help consolidate your knowledge and ensure you have a robust understanding of key concepts. This comprehensive course is designed to provide a solid foundation for students and professionals interested in respiratory health and medicine. Whether you're looking to advance your career in healthcare or simply broaden your understanding of the respiratory system, this course offers valuable insights and practical knowledge.