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RESPIRATION

Aerobic Respiration:
Respiration takes place in every cell in the human body.




GLUCOSE+OXYGEN WATER+CARBON DIOXIDE+ENERGY


C6H12O6+6O26H2O+6CO2+ENERGY


Anaerobic Respiration in Animals:


Small Amount



Glucose




Once there is
more oxygen in
the blood again, the oxygen breaks down the lactic acid ­ OXYGEN DEBT



GLUCOSELACTIC ACID+ENERGY



Anaerobic Respiration in Plants:

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GLUCOSE ETHANOL +CARBON DIOXIDE


This process is used to make beer, yoghurt etc.
GAS EXCHANGE IN HUMANS
Structure of the Thorax:




TRACHEA ­ Windpipe from mouth to lungs. C shaped cartilage rings.
INTERCOSTAL MUSCLES ­ Run between ribs. Contract + expand chest.
RIBS ­ Long curved bones that form the…

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INHALATION
EXHALATION




INHALED AIR EXHALED AIR
OXYGEN 21% 17%
CARBON DIOXIDE 0.04% 4%
NITROGEN 78% 78%
WATER VAPOUR Saturated Saturated
TEMPERATURE Air temperature Body temperature
(37°)

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Inhaled + Exhaled Air:


EXHALED AIR contains less oxygen that INHALED AIR because
the oxygen diffuses from the alveoli to the blood.

EXHALED AIR contains more carbon dioxide that INHALED AIR
because the carbon dioxide (made by cells in respiration) diffuses
from the blood to the alveoli and out.
Alveoli:…

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Smoking and Health:
TAR coats the ciliated cells in our breathing system. It is
also a carcinogen (a cancer causing agent)
CONSEQUENCE: If the cilia can't waft away the damaging particles, bacteria
multiply casing respiratory diseases.



CARBON MONOXIDE combines with haemoglobin in red
blood cells to form carboxyhaemoglobin which takes…

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Nicotine increases heart rate as it is a stimulant, which raises blood
pressure.
(Tar reduces efficiency of the lungs so heart has to work harder)
Carbon Monoxide (CO) attaches to red blood cells, so less oxygen
carried, cells still need to respire, therefore heart needs to pump
the blood (with…

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