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Think of the Following: Tears, Sweat, Saliva, Milk, Insulin, Urine. What Are These Excretion Or Secretion ? Why ? - Biology

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प्रश्न

Think of the following: Tears, sweat, saliva, milk, Insulin, urine.
What are these excretion or secretion ? Why ?

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उत्तर

Except urine, all others listed are secretions, because secretion is giving out by a cell or gland some substances that have some utility for the body. While excretion is the passing out of substances that have no further use in the body or are harmful.

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अध्याय 7: The Excretory System - Short Questions

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आईसीएसई Biology [English] Class 10
अध्याय 7 The Excretory System
Short Questions | Q 3

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