With reference to Coronavirus Outside lungs amp inside consider following statements Once the virus ...........

Explanation:

• Once the virus enters the body, it can cause discomfort when it reaches the air passages on the outside of the lungs. These passages conduct air into and from the lungs. The virus injures the lining of the passageways, and the body responds with an inflammation, which in turn irritates the nerves in the lining. That is when an infected person coughs.
• Infection can be more severe if the virus goes past the lining of the airways, and reaches the air sacs at the end of the air passages. Called alveoli, these sacs are responsible for the exchange of gas in the lungs.
• Alveoli are an important part of the respiratory system whose function it is to exchange oxygen and carbon dioxide molecules to and from the bloodstream. These tiny, balloon-shaped air sacs sit at the very end of the respiratory tree and are arranged in clusters throughout the lungs.
• If they get infected, the sacs respond with inflammatory fluids, which fill the air sacs.That is what leads to pneumonia — when the lungs’ ability to transfer oxygen is impaired, and the infected person has difficulty breathing. When a person cannot inhale enough oxygen and exhale enough carbon dioxide, pneumonia can lead to death.