3.  Which organ systems do you think are most necessary for the horse to create bodily movement?

4.  I can identify the structures and functions of the skeletal system.

5.  Provides a framework for the body and protects internal organs.  In combination with the muscular system provides for bodily motion.  Stores minerals, primarily calcium and phosphorus, and the bone marrow is the site of blood cell formation.  In mammals the system consists of bones, cartilage, teeth, and joints.

6.  Composed of calcium and small amounts of other minerals.  They are living structures that grow and are able of repairing themselves if damaged.  Animal nutrition is vital to bone health.  Bones are classified by shape as long, short, flat, and irregular.

7.  Long bones are cylindrical in shape. They are found in the limbs and typically support body weight and act as levers.

9.  Short bones are nearly equal in length and width. Short bones are found in the knee and hock and help to absorb the shock of impact.

10.  Flat bones are typically thinner than most other bones.  Flat bones such as the ribs, scapula, and some bones in the skull, surround and protect vital organs.

12.  Irregular bones have a variety of shapes and sizes.  Vertebrae and some bones in the skull are examples of irregular bones.

15.  A joint, or articulation, is the union of bone or cartilage.  Joints are classified as fibrous, cartilaginous, or synovial.  The classification of joints is based on joint structure and movability.

16.  Include those united by connective tissue or fused bone.  Fibrous joints typically do not permit any type of movement and include the bones of the skull.

17.  Those that include a pad of cartilage that divide and cushion vertebrae and allow only slight movement.

18.  Freely movable joints in which the bones are held together at the joints by ligaments.  Types of synovial joints include ball-and-socket, hinge, pivot, and gliding.