Breathing also causes dehydration, some people can hold their breath for more than 20 minutes, lungs floating on water are little known facts about the respiratory system.
The human respiratory system includes the lungs, trachea, diaphragm and alveoli to exchange gases, maintaining life for cells in the body. Below are things about the respiratory system that many people may not know.
Some people can hold their breath for more than 20 minutes.
Most people can only hold their breath for 1-2 minutes. Some world record divers can hold their breath for over 24 minutes.
The length of time a person can comfortably and safely hold their breath depends on their body and genetics. Inexperienced people should not attempt to hold their breath for longer than two minutes. Holding your breath for long periods of time can cause a sudden drop in the amount of oxygen in your blood, which can lead to health problems such as a heart attack.
Exhalation also loses water
Breathing allows the body to take in the necessary oxygen and expel CO2. When breathing, a person also exhales a lot of water, the amount of water exhaled at rest is 17.5 ml per hour.
Coughing, sneezing and yawning are natural respiratory mechanisms.
Coughing and sneezing cause the lungs to expel foreign substances that the body accidentally inhales. Yawning helps the body breathe more oxygen into the lungs. When tired and sleepy, yawning helps increase blood flow to the brain's blood vessels, leading to alertness.
Coughing and sneezing are natural reflexes that help the body expel foreign substances. Photo: Freepik
The nose filters, warms and humidifies the air.
Breathing through the nose has many health benefits because it filters out foreign agents. Nasal hairs filter out dust, allergens, and pollen, preventing them from entering the lungs. Breathing also helps to humidify the inhaled air. During breathing, the nose releases nitric oxide (NO) - a vasodilator, which helps to widen blood vessels. This can improve oxygen circulation in the body.
Breathing through the nose is beneficial because it allows the nasal cavities to increase air flow to the arteries, veins and nerves; increases absorption and circulation; reduces the risk of allergies, coughs...
Lungs floating on water
Each lung contains about 300 million alveoli, which remove CO2 and oxygenate the blood. When the alveoli are full of air, the lungs become the only organs in the human body that can float on water.
The left and right lungs are not exactly the same. The left lung is divided into two lobes, while the right lung is divided into three lobes. Because the heart is shifted to the left, the left lung is also smaller in size than the right.
Breathing with one lung is not as efficient as breathing with two healthy lungs. However, some people live with only one lung, but may have many limitations such as difficulty exercising, respiratory obstruction, and collapsed rib cage.
Le Nguyen (According to Live Science )
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