What is breathing?

  • (noun): The bodily process of inhalation and exhalation; the process of taking in oxygen from inhaled air and releasing carbon dioxide by exhalation.
    Synonyms: external respiration, respiration, ventilation
    See also — Additional definitions below


Breathing is the process that moves air in and out of the lungs or oxygen through other breathing organs such as gills. Aerobic organisms of these types—such as birds, mammals, and reptiles—require oxygen to release energy via respiration, in the form of the metabolism of energy-rich molecules such as glucose. Breathing is only one process that delivers oxygen to where it is needed in the body and removes carbon dioxide. Another important process involves the movement of blood by the circulatory system. Gas exchange occurs in the pulmonary alveoli by passive diffusion of gases between the alveolar gas and the blood in lung capillaries. Once these dissolved gases are in the blood, the heart powers their flow around the body (via the circulatory system). The medical term for normal relaxed breathing is eupnea.

Read more about Breathing.

Some articles on breathing:

Centered Riding
... The basic components of the centered riding system are "soft eyes", breathing, balance or building blocks, and centering ... Breathing techniques are used in all sports ... Breathing from your diaphragm relaxes the rider and makes them more athletically capable ...
Stuttering Therapy - Approaches - Diaphragmatic Breathing
... initiatives advocate diaphragmatic breathing (or costal breathing) as a means by which stuttering can be controlled ...
Breathing - See Also
... Apnea (suspension of breathing) Breath gas analysis Diaphragmatic breathing Kussmaul breathing Agonal breathing Cheyne-Stokes respiration Biot's respiration ...
Breathing Performance Of Regulators
... The breathing performance of regulators is a factor in choosing a suitable regulator for the type of diving to be undertaken, as it indicates the ability of a regulator to meet the demands placed ... It is desirable that breathing from a regulator requires low effort even when supplying large amounts of air ... Various breathing machines have been developed and used for assessment of breathing apparatus performance ...

More definitions of "breathing":

  • (adj): Passing or able to pass air in and out of the lungs normally; sometimes used in combination.
    Example: "The boy was disappointed to find only skeletons instead of living breathing dinosaurs"; "the heavy-breathing person on the telephone"
    Synonyms: eupneic, eupnoeic

Famous quotes containing the word breathing:

    Mark the babe
    Not long accustomed to this breathing world;
    One that hath barely learned to shape a smile,
    Though yet irrational of soul, to grasp
    With tiny finger—to let fall a tear;
    And, as the heavy cloud of sleep dissolves,
    To stretch his limbs, bemocking, as might seem,
    The outward functions of intelligent man.
    William Wordsworth (1770–1850)

    On like the wind they hurried, and Morgan rode in advance;
    Bright were his eyes like live coals, as he gave me a sideways
    And I was just breathing freely, after my choking pain,
    When the last one of the troopers suddenly drew his rein.
    Constance Fenimore Woolson (1840–1894)

    Of all the words mentioned in language, there is not one that I hate more than the word “right.” Is it your right that your field prospers? That you don’t drop dead this very instant? Are living and breathing your right? As far as I can see, nothing but grace and blessing fill the universe, and these worms talk about right?
    Franz Grillparzer (1791–1872)