1. The skeletal system consists of 206 bones and connective tissues like cartilage, tendons, and ligaments that provide structure and support to the body. 2. The skeletal system has several key functions - it facilitates movement by providing attachment points for muscles, provides support and protection to internal organs, stores minerals, and forms red and white blood cells in bone marrow. 3. There are four basic bone shapes: long bones in the arms, legs, and fingers; short bones in the wrists and ankles; flat bones in the skull and sternum; and irregular bones in the spine. The poster describes the structure of several specific bones.