The skeletal system is the central framework of the human body, consisting of bones, cartilage, ligaments, and tendons. An adult human skeleton contains 206 bones that work together to provide structural support, protect vital organs, and enable bodily movement. Licensed by Google Primary Functions
Support: Holding up the body and maintaining its overall shape.
Protection: Shielding soft internal organs, like the skull protecting the brain.
Movement: Serving as levers that skeletal muscles pull on to create motion.
Blood Production: Creating red and white blood cells inside the bone marrow.
Storage: Storing essential minerals like calcium and phosphorus for the body. Two Main Divisions
Axial Skeleton: Runs along the body’s central axis; includes 80 bones such as the skull, spine, and rib cage.
Appendicular Skeleton: Connects to the central axis; includes 126 bones making up the arms, legs, shoulders, and pelvis. Key Components
Bones: Dense structures made of collagen fibers and calcium mixtures.
Cartilage: Smooth, flexible tissue covering bone ends to reduce joint friction.
Ligaments: Tough, fibrous connective bands linking bone to bone at joints.
Tendons: Strong cords of tissue attaching skeletal muscles directly to bones.
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