Essentials of Human Anatomy & Physiology (12th Edition)

Published by Pearson
ISBN 10: 1292216239
ISBN 13: 978-1-29221-623-2

Chapter 11 - The Cardiovascular System - Review Questions - Page 422: 31

Answer

Following are the two exceptions mentioned in the book : 1. Pulmonary arteries and pulmonary veins 2. Umbilical arteries and umbilical veins

Work Step by Step

The pulmonary arteries carries oxygen-poor blood from heart to lungs and pulmonary veins carries oxygen-rich blood from lungs to heart. The umbilical arteries carries oxygen-poor blood from fetus to the placenta and the umbilical veins carries oxygen-rich blood from placenta to fetus. The maternal blood oxygenates the oxygen-poor blood at placenta.
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