Answer:

1. The skeletal system works as a support structure for your body. It gives the body its shape, allows movement, makes blood cells, provides protection for organs and stores minerals.

2. Shoulder joint and knee joint.

3. Synovial joints move in MANY directions. The main joints of the body — such as those found at the hip, shoulders, elbows, KNEES, wrists, and ankles — are freely MOVABLE. They are filled with synovial fluid, which acts as a lubricant to help the joints move easily.

4. Skeletal muscle, also called voluntary muscle, in vertebrates, most common of the three types of muscle in the body. ... Skeletal muscles are attached to bones by TENDONS, and they produce all the movements of body parts in relation to each other.

5. Muscles work in pairs and sometimes in more than pairs (2) because it makes the movement smooth. The muscle that is making the move is called the prime mover while another is called the antagonist and it resists the move. ... Sometimes the joint will have to be held in place and muscles called fixators will have this job.

6. The thoracic CAGE is formed by the 12 pairs of ribs with their costal cartilages and the sternum. The ribs are attached posteriorly to the 12 thoracic vertebrae and most are anchored anteriorly either directly or indirectly to the sternum.