Matching Pairs Skeletal SystemOnline version Match the following by Ms. Burton 1 Bones are made out of ? 2 The skull 3 The ribs 4 The hardness of bones is called ____________ 5 The spine Protect the heart, lungs, and other organs in the chest cavity. Different kinds of tissues/ Protects the brain and forms the shape of the face. Made up of vertebrate that support and protect the spinal cord. Crystals of Calcium