Biology
Biology
4th Edition
ISBN: 9781259188121
Author: Peter Stiling, Robert Brooker, Linda Graham, Eric Widmaier
Publisher: McGraw-Hill Education
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Chapter 49, Problem 7TY
Summary Introduction

Introduction: Waste materials such as excess metabolic wastes, excess ions, excess water, and toxic substances need to be removed from the body of the organism as the accumulation of such materials is harmful to the organism. This process is called excretion. Urination is a mode of excretion and has three steps: filtration, reabsorption and secretion.

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