Anatomy & Physiology: The Unity of Form and Function, 7th Edition

Published by McGraw-Hill Education
ISBN 10: 0073403717
ISBN 13: 978-0-07340-371-7

Chapter 18 - Section 18.5 - Figure 18.21 - Hemostasis - Page 698: 1

Answer

Fig. 18.21 A platelet plug is formed when when platelets adhere to exposed collagen fibers; this plug functions to seal off damaged blood vessels.

Work Step by Step

A clot develops when a fibrin network formed from fibrinogen enmeshes platelets. The seal formed by the fibrin clot lasts longer than a platelet plug. It not only halts the hemorrhage, but gives the blood vessel time to repair itself.
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