Answer:
(a) The
waste products of metabolism and their excretory organs are tabulated below
(b) Excretion is the removal of metabolic waste products which are formed
in chemical reactions in the cells.
Removal of faeces (defaecation) is the removal of undigested
or indigestible substances from the alimentary canal through the anus. Since,
faecal matter is not produced by metabolism, removal of faeces cannot be
considered as excretion.
Metabolic Waste
Products
Excretory Organs
Carbon
dioxide and water
Lungs
Urea
and nitrogenous substances water
Kidneys
Urea
and nitrogenous substances
Liver
Urea
and water
Skin
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