Skeletal Muscles

3. Origin: attaches to the cervical and thoracic vertebrae, Insertion: scapula, Function: extends head.
5. Origin: femur, Insertion: tibia, Function: flexes hip joint.
6. Origin: ischial tuberosity, Insertion: tibia, Function: extends the hip and tarsal joints.
7. Origin: maxilla and zygomatic arch, Insertion: mandible, Function: closes the jaw.
8. Limb moves away from the median plane.
10. Origin: atlas, Insertion: humerus, Function: extends head and neck and moves front legs forward.
12. Origin: scapula, Insertion: humerus, Function: abducts limb.
15. Origin: sternum, Insertion: humerus, Function: adduction, rotation of shoulder joint, extends limb.
16. Joint expands, angle increases, distal limb moves away from the body.
17. Origin: ribs, Insertion: iliac crest and linea alba, Function: expires air by pulling chest down to compress abdominal cavity.
18. Joint bends, angle decreases, and distal limb moves toward the body.

1. Origin: thoracic and lumbar vertebra and pelvis, Insertion: humerus, Function: extends, adducts, and rotates shoulder joint.
2. Origin: femur, Insertion: fibula and tibia, Function: flexes leg at knee joint.
4. Limb moves towards the median plane.
9. Origin: scapula and humerus, Insertion: olecranon, Function: extends elbow.
11. Origin: caudal distal femur, Insertion: tarsal, Function: flexes foot and leg.
13. Origin: ribs, Insertion: ribs, Function: inhalation and exhalation.
14. Origin: pelvic, Insertion: femur, Function: extends thigh.