Muscles of the Back, Abdomen and
Pelvis
Across
2. sphincter action in the anal canal
4. lateral erector spinae
7. medial erector spinae
11. compresses abdominal contents
13. flat muscle that divides the ventral cavity
Down
1. expiration
2. supports the viscera &
3. Flex and rotate lumbar vertebrae, stabilizes pelvis
5. extends thorax
6. deep muscle that flexes vertebral column, aid in trunk rotation and lateral flexion.
8. inspiration
9. opening and closing the urethra
10. middle erector spinae
12. superficial muscle that flexes vertebral column, aid in trunk rotation and lateral flexion