Dictionary.net

the metabolic processes whereby certain organisms obtain energy from organic moelcules; processes that take place in the cells and tissues during which energy is released and carbon dioxide is produced and absorbed by the blood to be transported to the lungs

The act of respiring or breathing again, or catching one's breath.

Relief from toil or suffering: rest.

Interval; intermission.

The act of resping or breathing; the act of taking in and giving out air; the aggregate of those processes bu which oxygen is introduced into the system, and carbon dioxide, or carbonic acid, removed.

The act of respiring or breathing again, or catching one's breath.

Relief from toil or suffering: rest.

Interval; intermission.

The act of resping or breathing; the act of taking in and giving out air; the aggregate of those processes bu which oxygen is introduced into the system, and carbon dioxide, or carbonic acid, removed.

The act or process of breathing.

Inspiration and expiration, q. v.

The function of breathing.

Breathing.

The process of interchange of oxygen and carbonic acid taking place between an organism and its surrounding medium.

A function proper to animals, the object of which is, to place the materials of the blood-the mixture of the venous blood with lymph and clyle, - in contact with atmospheric air, in order that it may acquire the vivifying qualities which belong to arterial blood. The organs for executing this function are, in the mammalia, birds, and reptiles, the lungs. In man. the respiration consists of mechanical and chymieal phenomena. The mechanical are Inspiration and Expiration. The evident chymieal phenomena consist in the formation of a certain quantity of carbonic acid, the absorption of a part of the oxygen of the air, and the disengagement of a quantity of water in the state of vapour. In the healthy condition the respiration is easy, gentle, regular, and without noise. In man, the respirations are generally about 35 per minute in the first year of life; 25 during the second; 20 at puberty; and 18 in the adult age. The air of respiration has been divided into first, the residual air, or that which cannot be expelled from the lungs, but remains after a full and forcible expiration, estimated at 120 cubic inches: secondly, the supplementary or reserve air or that which can be expelled by a forcible expiration, after an ordinary outbreathing, valued at 130 cubic inches: thirdly, the breath, tidal or breathing air, valued at 26 cubic inches: and fourthly, the complementary or complemental air, or that which can be inhaled after an ordinary inspiration, which amounts to 100 cubic inches. This estimate gives 250 cubic inches as the average volume of air which the chest contains after an ordinary expiration.

The act or function of breathing.

The mechanical processes of inspiration and expiration of air, or of supplying water to the gills, etc.

One complete inspiration followed by a complete expiration.

The taking up of oxygen and the giving off of carbon dioxid by the tissues of animals or plants; that part of the nutrient process which has to do with nutriment and waste in the gaseous form.

The absorption of oxygen by the blood in the lungs, the gills, etc., and the elimination of carbon dioxid and watery vapor at the same time and by the same organs. See external r.

n. [Latin] The act of breathing or drawing breath;- the act of inhaling air into the lungs, and expelling or exhaling it in return;— in physics, the absorption of oxygen from the air inhaled into the lungs, and the emission of carbonic acid in animals;—in plants, the inhalation of carbonic acid and the emission of oxygen.