The muscular system provides movement through muscles that are either voluntary or involuntary. There are three main types of muscles - skeletal, smooth, and cardiac. Skeletal muscles are striated and attached to bones, allowing for movement. They make up the majority of muscle tissue. Smooth muscles are involuntary and found in internal organs and blood vessels. Cardiac muscle is only located in the heart. The document then describes various muscles in the limbs, trunk, neck, and back of different animals. It notes muscles are important for supporting the body and enabling movement.

1. The Muscular System 11.0 Describe Animal Health Needs 11.3 Describe the musculoskeletal system

15. Muscles of Back Limbs or Legs

17. Muscles of the Muscles of the Back Limb (Hip and Thigh) The inner thigh is formed by the adductor muscles . The main action of the adductors is to pull the leg inward toward the other leg.

18. Muscles of the Muscles of the Back Limb (Hip and Thigh) The muscles that flex the hip are in front of the hip joint. These include the iliopsoas muscle . This deep muscle begins in the low back and pelvis and connects on the inside edge of the upper femur

22. Muscles of the Upper Leg

29. Dog Cattle Goat Cat Horse

30. The Complex System that is responsible for movement and protection of internal organs