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Summary Excretory System - IEB Grade 11 Life Sciences R85,00
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Summary Excretory System - IEB Grade 11 Life Sciences

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These notes include in depth, detailed summaries, with visual diagrams and colour coding in the form of digital handwritten notes. They are high-yield and can be used effectively to study for all relevant tests and exams. Compiled from the textbook, class hand-outs and additional research.

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  • January 2, 2025
  • 15
  • 2022/2023
  • Summary
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daisypybus
excretory

often.z

, revocation


definition : removal of metabolic wastes formed during metabolic reaction


if not removed wastes become toxic →
cause tissue
damage

:





inhibit normal functioning

kidney skin
organs lungs

:
, ,




↳ skin
: water + electrolytes lost
through sweat glands
↳ moisturizers + cools skin surface



lungs :
expel small amount of water as mucous secretions / water vapour

diffuse cell into bloodstream transported
products to
excretory organs


waste out 1-




three


an where waste products formed
excretory organ

not
many are





waste products produced in liver

nitrogenous waste non -




nitrogenous waste



amino acids broken down into ammonia •
creatine phosphates → found in muscle cells


↳ broken down into urea
↳ broken down into creatinine


↳ deamination
process :






drugs + medicines



nucleic acids ( RNATDNA ) →
broken down into uric acid


to liver if consumed
alcohol cause damage excessively


can




excretory racegoers


of
organ waste products excreted origin waste





kidney .
main : urea ,
uric acid ,
creatinine •

liver


other : minerals colourants
water drugs



, , , ,




preservatives




lungs main cells


C02

.
:






other : water vapour ,
02 ,
N2





skin •
main : water + salts .
cells



other : urea

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