Biology of
ventilation
Air moves from our lungs into the bloodstream
through tiny, air-filled sacs called alveoli.
Open circuit
ventilators
This is a very simple version of a ventilator
where waste gas is expelled from the system without recycling.
Closed circuit ventilators
This diagram is more like a modern medical ventilator. A CO2
filter recycles air to reduce waste. An outflow valve controlled by the
ventilator releases pressure that builds up as more and more fresh air is added
to the closed system.
Infographic via Tabletop Whale
Source: Explaining ventilators for COVID-19 – Scents of Science (myfusimotors.com)
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