Learning Objectives

After completing this exercise, you should be able to

1. locate and identify the muscles of the deep back, abdominal wall, and pelvic outlet;

2. describe the action of each of these muscles;

3. locate the origin and insertion of each of these muscles.

2. As a review activity, label figures 22.1, 22.2, 22.3, and 22.4.

3. Locate the following muscles in the torso: erector spinae group iliocostalis (lateral group) longissimus (intermediate group) spinalis (medial group) external oblique internal oblique transversus abdominis rectus abdominis

4. Demonstrate the actions of these muscles in your own body.

5. Locate the origin and insertion of each of these muscles in the human skeleton.

6. Complete Part A of Laboratory Report 22.

7. Locate the following muscles in the models of the male and female pelves:

levator ani coccygeus superficial transversus perinei bulbospongiosus ischiocavernosus

8. Locate the origin and insertion of each of these muscles in the human skeleton.

9. Complete Part B of the laboratory report.

Critical Thinking Application viM^V the muscles from superficial to deep for an appendectomy incision.

Essentials of Human Physiology

Essentials of Human Physiology

This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.

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