- the act of respiring; inhalation and exhalation of air; breathing.
- the sum total of the physical and chemical processes in an organism by which oxygen is conveyed to tissues and cells, and the oxidation products, carbon dioxide and water, are given off.
- an analogous chemical process, as in muscle cells or in anaerobic bacteria, occurring in the absence of oxygen.
Origin of respiration
Examples from the Web for respiration
And some reptiles add a fourth function to the overworked cloacal repository–that of respiration as well.What the Man With No Ass Crack Can Teach Darwinists and Creationists
January 14, 2014
And moderation, as it was justly said once, is the respiration of the philosopher.The Book of Khalid
In the first instance it served only as an organ of respiration.The Meaning of Evolution
Samuel Christian Schmucker
He was thinner than before, and his eyes were red and his respiration difficult.The Christian
It only hurries the respiration, and chokes the pulmonary vessels.The Bramleighs Of Bishop's Folly
Charles James Lever
Jimmy's respiration was so rapid that it couldn't be counted, so faint that it couldn't be heard.The Nigger Of The "Narcissus"
- the process in living organisms of taking in oxygen from the surroundings and giving out carbon dioxide (external respiration). In terrestrial animals this is effected by breathing air
- the chemical breakdown of complex organic substances, such as carbohydrates and fats, that takes place in the cells and tissues of animals and plants, during which energy is released and carbon dioxide produced (internal respiration)
Word Origin and History for respiration
late 14c., from Latin respirationem (nominative respiratio) "breathing, respiration," noun of action from past participle stem of respirare (see respire).
- The act or process of inhaling and exhaling; breathing.ventilation
- The act or process by which an organism without lungs, such as a fish or plant, exchanges gases with its environment.
- The oxidative process occurring within living cells by which the chemical energy of organic molecules is released in a series of metabolic steps involving the consumption of oxygen and the liberation of carbon dioxide and water.
- Any of various analogous metabolic processes by which organisms, such as fungi, obtain energy from organic molecules.
- The process by which organisms exchange gases, especially oxygen and carbon dioxide, with the environment. In air-breathing vertebrates, respiration takes place in the lungs. In fish and many invertebrates, respiration takes place through the gills. Respiration in green plants occurs during photosynthesis.
- See cellular respiration.