Most people breathe in and out about 12 to 15 times a minute - about 720 to 900 times an hour. Each breath is about 500 ml of air.
With training most people can reduce their breathing rates to about 3 times a minute with a corresponding increase in volumetric exchange.
The average human normally takes in about 35 lbs of air per day.
The average adult at rest inhales and exhales something like 7 or 8 liters (about one-fourth of a cubic foot) of air per minute. That totals something like 11,000 liters of air (388 cubic feet) in a day.
The air doesn't change much from day to night, so we Breathe the same stuff at night as during the day.
The diaphragm is the organ that helps you breath 282 cubic feet of air that you need every day.
We swallow about a gallon of mucus a day. Dust and bacteria are in the air we breath and gets filtered into mucus. This is why it is healthier to breath through our nose.
On a warm day, the air temperature is likely higher than your body temperature, so when you exhale, the warm air quickly mixes with the surrounding air and dissipates. This prevents the condensation of water vapor in your breath, which is what makes it visible on colder days.
When you exhale on a cold day, your breath appears cold because the warm air from your lungs meets the cold air outside, causing the water vapor in your breath to condense into tiny droplets, creating a visible mist.
On a hot day, the warm temperature of the air prevents condensation from forming when you exhale, so you won't see your breath. When you can see your breath, it's because the warm, moist air you exhale is meeting cooler air, causing the moisture to condense into droplets that are visible.
The warm water vapour in your breath condenses into water droplets when it hits the cold air.
This happens because the warm air from the person's breath hits the cold surface of the glass, causing the water vapor in the air to condense into tiny droplets that appear as a faint white mist.
288 cubic feet of "air" or 19 cubic feet of pure oxygen .
if it is 32 degrees Fahrenheit or 0 degrees Celsius, than when you breathe out the water in your breath condenses in the air