BIO
Powerpoint 15 - Animals - circulation

Powerpoint 15 - Animals - circulation - Animals Respiration...

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Animals: Respiration Outline 1. Key concepts 2. Respiratory surface and systems 3. Human respiratory system 4. Transportation of O2 and CO2 5. Smoking and diseases 6. Key terms 7. Conclusions 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): glucoase + O2 -> CO2 + H2O + E (ATP) 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 cell to air down a gradient. Respiratory surface and systems 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. Earthworm, have circulatory system, oxygen diffused through body surface come to circulatory system through body surface come to circulatory system. CO2 diffused out from the circulatory system to body surface 2. Trachea. (tracheae – tubules)
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  • Spring '08
  • Reichler
  • respiratory surface

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