Answer
d.
Work Step by Step
The diaphragm is made up of smooth muscle that forms a dome under the lungs and can be voluntarily controlled. This muscle separates the thoracic and abdominal cavities.
Biology: The Unity and Diversity of Life (14th Edition)
by Starr, Cecie; Taggart, Ralph; Evers, Christine; Starr, Lisa
Published by
Brooks/Cole Publishing Co.
ISBN 10:
1305073959
ISBN 13:
978-1-30507-395-1
Chapter 38 - Self-Quiz - Page 685: 14
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