Skeletal system

The following session will cover skeletal system, focusing on the main divisions and structures of the skeletal system, including the axial and appendicular skeletons and how their design supports body functions. We will explain the classification of bones by shape and structure, as well as their unique roles and composition. The processes of bone renewal and the key cellular components involved will be discussed, along with the types and functions of joints. Finally, we will address the vital roles of the skeletal system and common disorders such as osteoporosis and osteoarthritis. The skeletal system forms the body's internal framework with two major divisions, the axial and appendicular skeletons. The axial skeleton, including the skull, vertebral column, and thoracic cage, supports and protects the brain, spinal cord, and vital organs. The appendicular skeleton consists of limb bones and the shoulder and pelvic girdles, enabling movement. Each bone's structure and orientation reflect its specific function, showing how the design of the skeleton supports the functions it performs. Bones are classified by shape and structure into long, short, flat, irregular and sesamoid bones. Long bones, like the femur and humerus, act as levers for movement, while short bones in the wrist and ankle provide stability with some movement. Flat bones, such as the skull and sternum, protect organs and provide muscle attachment. Irregular bones like vertebrae,