Biolog 40 - Chapter 40: Respiration A. Functions of the...

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Chapter 40: Respiration A. Functions of the Respiratory System 1. GASEOUS EXCHANGE: Main function of respiratory system is gaseous exchange. Through respiratory system new air is always brought into the body and used air is expelled out. In this way oxygen is gained and carbon dioxide is lost by the body. 2. EXCRETION OF CARBON DIOXIDE: Respiratory system is the major system for excretion of carbon dioxide from the body. Carbon dioxide is produced as a result of metabolic break down of carbohydrates in body and must be eliminated quickly. Carbon dioxide is brought to the lungs by blood and is lost from the lungs through gaseous exchange with fresh air in lungs. 3. OXYGENATION OF BLOOD: Oxygen is required by the body for breakdown of food and must be continuously supplied for continuous supply of energy. Supply of oxygen is maintained by respiratory system. B. Invertebrate Respiration - small invertebrates of aquatic or moist habitats use integumentary exchange. -many have thin walled, moist gills that are extensively folded. -insects and spiders use tracheal respiration. C. Vertebrate and Human - Fish use a countercurrent flow mechanism that boosts oxygen uptake from water. -some fishes and all amphibians, birds, and mammals have lungs. -birds have a unique ventilating system. -many air sacs force air continuously through tubes that thread through the
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This note was uploaded on 12/03/2011 for the course CHEM BIO P 101 taught by Professor Kk during the Spring '11 term at Rochester.

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Biolog 40 - Chapter 40: Respiration A. Functions of the...

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