Respiration - Animals: Respiration Animals: We need energy!...

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1 Animals: Respiration Animals: Respiration We need energy!! Outline Outline 1. Key Concepts 2. 3. Human Respiratory System 4. Transportation of O 2 and CO 2 5. Smoking and diseases 6. Key terms 7. Conclusions Key Concepts: Key Concepts: 1. Multicelled animals require the most energy to drive metabolic activities 2. Aerobic respiration produces the most ATP Aerobic respiration (sometimes called cellular respiration): glucose + O 2 b CO 2 + H 2 O + E (ATP)
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2 Key Concepts: Key Concepts: 3. Respiration (Gas exchange) allows animals to move oxygen into their internal environment and give up carbon dioxide to the external environment 4. Oxygen diffuses into the body as a result of pressure gradients, and Carbon dioxide diffuses from cells to air down a gradient Respiratory surface – cell membrane across which respiratory gases are exchanged (a. surface area b. moist condition) 1. Body surface: planarian flatworm, no circulatory system and A. the body is flattened, all cells close to external oxygen supply. B. digestive cavity highly branched, carry food also oxygen to all regions of the body. Body surface: Earthworm, have circulatory system, oxygen diffused through body surface come to circulatory system. CO 2 diffused out from the circulatory system to body surface 2. Tracheae: (tracheae = tubules) insects and spiders Insects have circulatory systems but they don’t transport respiratory gases. Oxygen diffuses across the moistened walls of tracheae is then directly absorbed by tissues. CO2 goes the opposite direction.
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This note was uploaded on 02/16/2010 for the course BIO 49970 taught by Professor Chinnery during the Spring '10 term at University of Texas at Austin.

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Respiration - Animals: Respiration Animals: We need energy!...

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