What are the main functions of the skeletal system?

The skeletal system is the body's framework, composed of bones, cartilage, ligaments, and joints. Its main functions are:

1. Support: Gives the body shape and posture.
2. Protection: Safeguards vital organs. For example, the skull protects the brain, and the ribs protect the heart and lungs.
3. Movement: Works in conjunction with muscles to facilitate body movement.
4. Blood Cell Production (Hematopoiesis): Occurs in the bone marrow, where red blood cells (RBCs), white blood cells (WBCs), and platelets are produced.
5. Storage: Stores essential minerals like calcium and phosphorus, and stores fat in yellow marrow.