1. Respiratory system

    The respiratory system consists of organs and structures that allow us to breathe by taking in oxygen and expelling carbon dioxide. The main parts include the lungs, nasal cavity, sinuses, blood vessels, and various air passageways.
    COVID-19: Answers to frequently asked questions
    Respiratory system imageSphenoid sinusEpiglottisPleural cavityRight lungPharynxDiaphragmLarynxFrontal sinusOral cavityTracheaLeft lungBronchusNasal cavity
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  2. Respiratory System: Organs, Facts, Anatomy & Function

     
  3. Respiratory system - Wikipedia

  4. Respiratory System: How It Works, Common Issues, and More

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