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3.4 HOMEOSTASIS IN

HUMANS

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HOMEOSTASIS

The maintenance ofrelatively constant internal

environment

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KIDNES

Regulate the water & salt

balance in the body by

•excreting moreless salt•Increasing the inta!e

loss o" water 

Regulate osmotic

#ressure & ionic le$els inthe blood

Excrete waste

#roducts

Regulate the blood

#H

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RE%A ARTER' ( Su##lies

oxygenated blood & nutrients

to the !idney

RE%A )EI% ( carries "iltered

blood away "rom !idney

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      N      E      !      H

      "      O      N      S

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*lomerulus+owman,s

-a#suleRenal tubule

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#O"MATION O# U"INE

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.TRA/ITRATIO% REA+SOR0TIO% SE-RETIO%

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1ater 

*lucose

 Amino acids

.rea

Mineral Salts

R+-0lasma

#roteins

.ltra"iltration

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OSMO"E$U%ATION

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RE)ISIO%

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