Expert: Walter Hintz - 11/9/2005

Question
please answer this question --- thanks very much
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            URGENT - i have exam
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compare breifly between excretion in plants and in man...



many thnaks .................

Answer
Excretion is carried about mainly by diffusion in both plants and animals.
 Mammals use the lungs, skin and kidneys as excretory organs. Most animals have a n anologous organ that functions like a kidney. The maine waste product in animals is Nitrigen and in plants the wastes are O2, CO2 and H2O
> With plants it depends upon the type of plant.  Some plants have vacuoles that accumulate waste and lose it through exocytosis.  In diciduous trees wastes are stored in the leaves and are lost when the leaf falls off.