Human Biology, 14 Edition

Published by McGraw-Hill Education
ISBN 10: 1-25924-574-8
ISBN 13: 978-1-25924-574-9

Chapter 5 - Section 5.5 - Two Cardiovascular Pathways - Check Your Progress - Page 104: 1

Answer

All blood collects in the right atrium before passing into the right ventricle. From here it is pumped into the pulmonary trunk. The pulmonary trunk divides the blood into the right and left pulmonary arteries, which branch out into several arterioles which carry the blood to the pulmonary capillaries. The pulmonary capillaries take carbon dioxide from the blood and supply the blood with oxygen. The oxygen-rich blood then passes through the pulmonary venules to the four pulmonary veins, which carry the blood to the left atrium.

Work Step by Step

All blood collects in the right atrium before passing into the right ventricle. From here it is pumped into the pulmonary trunk. The pulmonary trunk divides the blood into the right and left pulmonary arteries, which branch out into several arterioles which carry the blood to the pulmonary capillaries. The pulmonary capillaries take carbon dioxide from the blood and supply the blood with oxygen. The oxygen-rich blood then passes through the pulmonary venules to the four pulmonary veins, which carry the blood to the left atrium.
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