Biology 2010 Student Edition

Published by Prentice Hall
ISBN 10: 9780133669510
ISBN 13: 978-0-13366-951-0

Chapter 34, Endocrine and Reproductive Systems - Assessment - 34.1 The Endocrine System - Understand Key Concepts/Think Critically - Page 1004: 6

Answer

Hormones are released by endocrine system in blood stream. However, they do not affect all body organs. They only affect specific tissues/organs of the body for which they were released.
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