| A | B |
|---|
| deltoid | triangular muscle of the shoulder that is used for shoulder abduction. |
| diaphragm | muscle used for breathing |
| external intercostals | muscle used for inhaling air |
| internal intercostals | muscle used for exhaling air |
| internal oblique | flexes vertebral column |
| latissimus dorsi | extends, adducts, and rotates arm medially at should joint |
| pectoralis major | adducts and rotates arm medially at shoulder joint; flexes and extends arm at shoulder joint |
| rectus abdominis | flexes vertebral column; and compresses the abdomen to aid in various activities. |
| transversus abdominis | compresses abdomen |
