Principles of Anatomy and Physiology 14e with Atlas of the Skeleton Set (14th Edition)

Published by Wiley
ISBN 10: 1-11877-456-6
ISBN 13: 978-1-11877-456-4

Chapter 11 - The Muscular System - Figure 11.1 - Page 329: 1

Answer

The triceps brachii extends the forearm. Its belly is posterior to (behind) the humerus.

Work Step by Step

The triceps brachii extends the forearm, but the contraction of the biceps brachii flexes the forearm. The belly of the triceps brachii is posterior to the humerus; in contrast, the belly of the biceps brachii is in front of the humerus.
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