Boeing 737 (in context of pressure systems)

The Boeing 737 uses a pressurized cabin system to keep passengers comfortable and safe at high altitudes where the outside air is thin and unbreathable. The aircraft's environmental control system maintains a safe internal pressure by compressing outside air and circulating it throughout the cabin. This system involves air conditioning packs, outflow valves, and pressurization controllers that work together to regulate pressure levels, prevent discomfort, and ensure structural integrity. Essentially, it creates a controlled, breathable environment inside the plane despite flying where atmospheric pressure is much lower than at ground level.