Excerpt from The Philosophy of Health, or an Exposition of the Physical and Mental Constitution of Man, Vol. 2 of 2: With a View to the Promotion of Human Longevity and Happiness
Respiration in the plant; in the animal - Aquatic and aerial respiration - Apparatus of each traced through the lower to the higher classes of animals - Apparatus in man - Trachea, Bronchi, Air Vesicles - Pulmonary artery - Lung - Respiratory motions: inspiration; expiration - How in the former air and blood flow to the lung; how in the latter air and blood flow from the lung - Relation between respiration and circulation - Quantity of air and blood employed in each respiratory action - Calculations founded on these estimates - Changes produced by animal respiration on the air: changes produced by vegetable respiration on the air - Changes produced by respiration on the blood - Respiratory function of the liver - Uses of respiration.
313. No organized being can live without food and no food can nourish without air. In all creatures the necessity for air is more urgent than that for food, for some can live days, and even weeks, without a fresh supply of food, but none without a constant renewal of the air.
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