Page 4 - E-Biology Sec.2 2024-2025 U1_Handy
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Excretory materials
CO2 Excess salts Nitrogenous Spices Poisonous
and water wastes
It is produced Volatile
with water The body gets as ammonia, urea and
vapour when rid of excess uric acids are
produced from
the body cells salts by
burn digested dissolving breaking proteins.
food (organic them in the
excess water Small %
molecules)
Organs of excretion in higher animals
Exhaled air Sweat
Urine
Their functions: Disposal of damaged & poisonous materials
Regulation of the body contents of water & minerals.
3
Second Term
