Overview of Gaseous Exchange (Grade 11 NSC Matric Life Sciences): Flashcards
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Breathing definition
Breathing definition
Mechanical action moving air in/out of lungs
Gaseous exchange definition
Gaseous exchange definition
O2 & CO2 swap between air in lungs & blood
Cellular respiration definition
Cellular respiration definition
Glucose + O2 → energy + CO2 + H2O in cells
Why moist conditions for gas exchange
Why moist conditions for gas exchange
Gases only dissolve & move across surfaces in water
Why large surface area for gas exchange
Why large surface area for gas exchange
Allows sufficient O2 & CO2 to move across
Why thin walls for gas exchange
Why thin walls for gas exchange
Faster gas passage/diffusion
Fish gas exchange organ
Fish gas exchange organ
Gills with branched filaments, protected by opercula
Mammalian gas exchange organ
Mammalian gas exchange organ
Lungs with millions of alveoli (tiny air sacs)
Diffusion
Diffusion
Molecule movement from high to low concentration
Aerobic process
Aerobic process
Process requiring oxygen