Lungs And Breathing Concepts

What we verified before publishing

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The following claims were verified through Perplexity Sonar before the questions were finalised. The host can reference any of them during play:

• The main function of the respiratory system is to transport oxygen into the body and remove carbon dioxide waste gas.
• The diaphragm is the primary muscle responsible for breathing, expanding and contracting the chest to draw air in and out.
• Air enters the body through the nasal cavity, where it is warmed, humidified, and filtered by mucus and hairs before reaching the lungs.
• The trachea, or windpipe, splits into two bronchi, one leading to each lung.
• Bronchi branch into smaller tubes called bronchioles, which end in microscopic air sacs known as alveoli.
• Alveoli are the site of gas exchange, where oxygen passes into the blood and carbon dioxide moves out of the blood to be exhaled.
• Type 2 alveolar cells produce surfactant, a substance that lowers surface tension to make it easier for alveoli to inflate.
• When inhaling, the diaphragm contracts and moves downward while intercostal muscles pull the ribcage upward and outward, increasing thorax volume.
• When exhaling, the diaphragm relaxes and domes upward while intercostal muscles relax, decreasing thorax volume and increasing internal pressure to push air out.
• The human lungs extract about 15% of the oxygen inhaled, meaning exhaled air still contains approximately 17% oxygen.
• Smoking the air we breathe typically consists of about 78% nitrogen, 21% oxygen, and less than 1% argon and trace gases.
• Relaxed breathing is a reflex, meaning humans do not need to consciously think about the process to breathe.