The bones of the skeletal system give our bodies the support they require. Learn how bone forms, the difference between spongy bone and compact bone, how to keep bones healthy, and more.

Why do we have bones? -- What are bones made of? -- How are bones connected? -- Types of bones -- The spine -- The hand -- The skull -- Keeping bones healthy -- How do we see bones? -- Breaking a bone -- Bone diseases -- Bone replacement -- Bones of the future.