Your thumping heart -- Heart parts -- What makes a heart beat? -- Blood (and iron) -- What color is your blood? -- Types of blood -- Blood vessels -- The body's delivery service -- The body's garbage service -- Defence against microbe attacks -- Your circulation -- out of this world -- Helping hearts -- Maintenance and servicing -- Heart words -- Hearty information.
This resource is supported by the Institute of Museum and Library Services under the provisions of the Library Services and Technology Act as administered by State Library of Iowa.