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2. Respiratory rate - Wikipedia

   en.wikipedia.org/wiki/Respiratory_rate

   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 ...

3. Lung volumes and capacities - Wikipedia

   en.wikipedia.org/wiki/Lung_volumes_and_capacities

   Lung volumes and lung capacities are measures of the volume of air in the lungs at different phases of the respiratory cycle. The average total lung capacity of an adult human male is about 6 litres of air. [1] Tidal breathing is normal, resting breathing; the tidal volume is the volume of air that is inhaled or exhaled in only a single such ...

4. Breathing - Wikipedia

   en.wikipedia.org/wiki/Breathing

   The breathing of all vertebrates with lungs consists of repetitive cycles of inhalation and exhalation through a highly branched system of tubes or airways which lead from the nose to the alveoli. [4] The number of respiratory cycles per minute is the breathing or respiratory rate, and is one of the four primary vital signs of life. [5]

5. List of terms of lung size and activity - Wikipedia

   en.wikipedia.org/wiki/List_of_terms_of_lung_size...

   Following are terms that specify a type of lung size and/or activity. More specific definitions may be found in individual articles. Eupnea – normal breathing; Apnea – absence of breathing

6. Vital signs - Wikipedia

   en.wikipedia.org/wiki/Vital_signs

   [1] [2] The normal ranges for a person's vital signs vary with age, weight, sex, and overall health. [3] There are four primary vital signs: body temperature, blood pressure, pulse , and breathing rate (respiratory rate), often notated as BT, BP, HR, and RR. However, depending on the clinical setting, the vital signs may include other ...

7. Work of breathing - Wikipedia

   en.wikipedia.org/wiki/Work_of_breathing

   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 ...