COVID-19 - How does it affect you? 
Gas Exchange 
Each ...

COVID-19 - How does it affect you? 

Gas Exchange 

Each sac of air, or alveolus, is wrapped with capillaries where red blood cells release carbon dioxide (CO2) and pick up oxygen (O2). Two alveolar cells facilitate gas exchange; Type I cells are thin enough that the oxygen passes right through, and Type II cells secrete surfactant — a substance that lines the alveolus and prevents it from collapsing.

Viral Infection

The spike proteins covering the coronavirus bind ACE2 receptors on type II alveolar cells, allowing the virus to enter the cell via endosome or membrane fusion and release its RNA. The RNA "hijacks" the cell, telling it to assemble many more copies of the virus and release them into the alveolus. The host cell is destroyed in this process and the new coronaviruses infect neighbouring cells.

Avesta Rastan @azuravesta

#COVID19 #Pathophysiology #SARSCOV2 #PatientInfo
Contributed by

Dr. Gerald Diaz
Board Certified Internal Medicine Hospitalist, GrepMed Editor in Chief 🇵🇭 🇺🇸 - Sign up for an account to like, bookmark and upload images to contribute to our community platform. Follow us on IG: | Twitter:
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