At rest, the average adult inhales around 20 percent oxygen in the air and exhales about 15 percent oxygen, according to HowStuffWorks. People inhale and exhale approximately 7 or 8 liters of air each minute or 11,000 liters per day.Continue Reading
HowStuffWorks states that 5 percent of the volume of air is consumed each time a person inhales and is converted to carbon dioxide. Thus, a person uses around 550 liters of pure oxygen daily. Dr. Dawn A. Tamarkin of the Springfield Technical Community College explains that the normal amount of air breathed in and out at rest is called the tidal volume of air. The maximum amount of air a person can inhale and exhale is known as the vital capacity. A person normally does not use his entire vital capacity. When speaking or being active, a person takes in and lets out more air than the tidal volume.
The body only uses air when there is gas exchange, which occurs in the alveoli, notes Dr. Tamarkin. Upon inhaling, a person takes air into the respiratory system, and the air travels into the alveoli. Some air remains in the nasal cavity, trachea, bronchi and bronchioles to avoid creating a vacuum. The air stays in the respiratory passageways, and it cannot be used by the body.Learn more about Biology
Human beings require air because, like all other animals, they are aerobic organisms who require oxygen, which is a component of air. While oxygen is found in water, humans evolved to extract the oxygen from air, as birds, mammals and reptiles do, instead of from the water, as fish and some amphibians do. Additionally, air is necessary to keep the planet warm as it insulates the planet like a blanket.Full Answer >
Anaerobic is defined as being able to exist without, or not requiring air or oxygen. Most often, anaerobic is used to define a cell or organism that lives without oxygen. The term may also be used to describe a process or function that occurs without air.Full Answer >
Photosynthesis plays an important role in the environment for several reasons as it helps clean the air because plants use the carbon dioxide in the air for photosynthesis, the plants produce oxygen as a by-product which all humans and animals need to live and it also makes plants grow, providing food for animals that feed on plants. Without plants, the world would quickly become uninhabitable for human and animal life. The oxygen would be used up and there would be no food to feed the animals that humans rely on for food.Full Answer >
An average human exhales around 2.3 pounds of CO2 in a day. That rate increases by up to a factor of eight during heavy physical exertion and falls somewhat during periods of relaxation, such as during sleep.Full Answer >