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Excretion in 0610 Cambridge IGCSE $3.09
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Excretion in 0610 Cambridge IGCSE

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This document is written by a former IGCSE student ‍. it is written in simple and easy statements not to mention the labelling on the kidney and nephron structure! also, the role of kidney in both homeostasis and excretion is explained briefly in quite a comprehensible way.

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  • January 13, 2025
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Classwork 12 Jan


Renal= To/From kidney

Cortex
Medula
Pelvis
Renal Artery
Renal Vein

Second/Distal
First/proximal Bowman’s capsule coiled/covulated
coiled/covulated tubule
Glomerulus
Ureter tubules




1)Bowman’s capsule:is the site where
ultrafiltration occurs. The high blood
pressure allows filtration. Small
soluble molecules are filtered out and
are forced out of capillary pores in Loop of henle

glomerulus (eg:
Glucose,O2,urea,water,salts,amino Collecting duct

acids SO all blood content except To ureter

blood cells-RBCs,WBCs,Platelets-and
plasma proteins like fibrinogen bcz
they are large molecules to pass
through the membrane ) to be
collected in the Bowman’s capsule
2)First coiled tubule/proximal covulated tubule: is the place where
selective reabsorption occurs.Useful molecules like most of glucose is
reabsorbed by ACTIVE TRANSPORT (in which some glucose and O2 are
aerobically respired to release energy), amino acids and salts by
ACTIVE TRANSPORT, and remaining water by osmosis into the blood

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