Search results
Results from the WOW.Com Content Network
Exhalation (or expiration) is the flow of the breath out of an organism. In animals, it is the movement of air from the lungs out of the airways , to the external environment during breathing . This happens due to elastic properties of the lungs, as well as the internal intercostal muscles which lower the rib cage and decrease thoracic volume.
The in-breath is followed by the out-breath, giving the respiratory cycle of inhalation and exhalation. There are three phases of the respiratory cycle: inspiration, post-inspiration or passive expiration, and late or active expiration. [14] [15] The number of cycles per minute is the respiratory rate.
The higher pressure will "win". Hence, the closure of the pulmonary valve (P 2) will be delayed since the pressure in the right ventricle is increased in inspiration, opposing the pressure in the pulmonary artery and keeping it open longer than in expiration. The change in A 2 is not that evident. Thus P 2 appears after A 2 in inspiration ...
Doing spirometry. Spirometry (meaning the measuring of breath) is the most common of the pulmonary function tests (PFTs). It measures lung function, specifically the amount (volume) and/or speed (flow) of air that can be inhaled and exhaled.
The Hering–Breuer inflation reflex, named for Josef Breuer and Ewald Hering, [1] [2] [3] is a reflex triggered to prevent the over-inflation of the lung. Pulmonary stretch receptors present on the wall of bronchi and bronchioles of the airways respond to excessive stretching of the lung during large inspirations.
The physiological definition of respiration differs from ... lungs and perfusion is the circulation of blood in the pulmonary ... biology 146149; C.Michael Hogan ...
Wheezes, describing a continuous musical sound on expiration or inspiration. A wheeze is the result of narrowed airways. Common causes include asthma and emphysema. [20] Rhonchi (an increasingly obsolete term) characterised by low pitched, musical bubbly sounds heard on inspiration and expiration. Rhonchi are the result of viscous fluid in the ...
Inhalation of air, as part of the cycle of breathing, is a vital process for all human life.The process is autonomic (though there are exceptions in some disease states) and does not need conscious control or effort.