Our body has three main sections - the head, torso, and limbs. The skeleton is made up of many bones that support and protect the body. The skull protects the brain and ribs protect the lungs and heart. Muscles connect to bones and work in pairs to pull bones and allow movement. Joints are where two or more bones meet, and the body bends at joints with help from muscles. We need to protect our body from accidents by being alert, wearing protective gear like helmets and knee pads, and choosing appropriate clothes for exercise.