How does the skeleton provide physical protection and protection against infection?

The skeleton provides physical protection by encasing vital organs, such as the brain within the skull and the heart and lungs within the ribcage, thereby shielding them from trauma. Additionally, certain bones, like the sternum and pelvis, contain bone marrow, which produces blood cells, including white blood cells that are crucial for the immune response. This dual role of physical and immune protection ensures that the body is safeguarded against both external injuries and infections.