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Yawning is considered a non-respiratory gas movement. A non-respiratory gas movement is another process that moves air in and out of the lungs that do not include breathing. Yawning is a reflex that tends to disrupt the normal breathing rhythm and is believed to be contagious as well. [14] The reason why we yawn is unknown.
In the mammalian respiratory system, eupnea is normal, good, healthy and unlabored breathing, sometimes known as quiet breathing or a resting respiratory rate. In eupnea, expiration employs only the elastic recoil of the lungs. Eupnea is the unaffected natural breathing in all mammals, including humans.
In infants and children, cardiac arrest is typically caused by (1) hypoxic/asphyxial arrest and less commonly by (2) sudden cardiac arrest due to heart problems or arrhythmias. In adults, cardiac arrest is usually caused by heart problems such as acute coronary syndrome. Hypoxic/asphyxial cardiac arrest is a result of progressive respiratory ...
“Breathing this way synchronizes our respiratory rate with our heart rate, allowing our cardiovascular system, nervous system and brains to function more efficiently.” 5. Bahya pranayama
The normal relaxed state of the lung and chest is partially empty. Further exhalation requires muscular work. Inhalation is an active process requiring work. [4] Some of this work is to overcome frictional resistance to flow, and part is used to deform elastic tissues, and is stored as potential energy, which is recovered during the passive process of exhalation, Tidal breathing is breathing ...
Airway resistance can also vary between inspiration and expiration: In emphysema there is destruction of the elastic tissue of the lungs which help hold the small airways open. Therefore, during expiration, particularly forced expiration, these airways may collapse causing increased airway resistance.
The respiratory centre in the medulla and pons of the brainstem controls the rate and depth of respiration, (the respiratory rhythm), through various inputs. These include signals from the peripheral chemoreceptors and central chemoreceptors; from the vagus nerve and glossopharyngeal nerve carrying input from the pulmonary stretch receptors ...
An evaluation of respiratory rate for the differentiation of the severity of illness in babies under 6 months found it not to be very useful. Approximately half of the babies had a respiratory rate above 50 breaths per minute, thereby questioning the value of having a "cut-off" at 50 breaths per minute as the indicator of serious respiratory ...