CONTENTS : .-v. 1. The artifical kindney . -v. 2. Biological barriers.-v. 3. Circulation .- v. 4. Control of breathing .- v. 5. From egg to adult .- v. 6 The heart- lung machine. -v.7. Human preguancy and birth .-v. 8. Interaction .-v. 9. Metabolism.- v. 10. Photosynthesis.v. 11. , 12. Thinking quantitatively I, II