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Chapter 33-Respiration - Chapter33:Respiration...

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Chapter 33: Respiration http://www.colbertnation.com/the-colbert-report-videos/2170
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What is Respiration? The combination of cellular respiration and breathing (together) are called respiration
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In what organelle does cell respiration occur? 1. chloroplast 2. golgi body 3. endoplasmic reticulum 4. mitochondria 5. nucleus
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Cellular Respiration This process requires a steady supply of O2 and generates CO2 as waste
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Breathing The breathing process extracts O2 from air in your lungs , blood carries it within diffusing distance of each cell, then picks up CO2 for release in the lungs.
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Diffusion -Movement from high concentration to low concentration High concentration Low concentration How Does Respiration Occur?
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Gas exchange (Respiration) in all organisms is based on diffusion Cellular respiration depletes O2 (low concentration in the cells) and increases CO2 levels (high concentration in the cells)
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Inside Cells In Blood High CO2 Low O2 Low CO2 High O2 Concentration Gradients - Move from High to Low Concentration
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All respiratory systems have 3 features that facilitate diffusion: 1. Be moist (gases must be dissolved in water to diffuse) 2. Have thin tissues lining respiratory surfaces (to help diffusion of gasses through them) 3. Have large surface areas (to allow for adequate gas exchange)
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Organisms Without Specialized Respiratory Structures Nudibranch, jellyfish, sponge
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If the organism is thin and flat (nudibranch & flatworm), most cells are close to the moist skin through which gases diffuse.
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For larger, thick- bodied organisms (jellyfish), cells may be far from the surface, but require little oxygen .
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