Includes bibliographical references (p. 31) and index.
Contents:
What is my respiratory system? -- Why do I breathe? -- How do I breathe? -- What is my windpipe? -- What is my diaphragm? -- What are my lungs? -- How do my lungs work? -- How does oxygen get into my blood? -- How is oxygen used? -- Why do I breathe carbon dioxide out? -- The respiratory system -- Why do I feel out of breath? -- Did you know?
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.