'''[[Ascertaining The Human Dietetic Character, Part I|-Previous-Lesson 18-]] | -PDF pages 418-439- | [[Life Science Health System - T.C. Fry|-Table of Contents-]] | [[The Physiology Of Digestion|-Next-Lesson 20-]]''' | '''[[Ascertaining The Human Dietetic Character, Part I|-Previous-Lesson 18-]] | -PDF pages 418-439- | [[Life Science Health System - T.C. Fry|-Table of Contents-]] | [[The Physiology Of Digestion|-Next-Lesson 20-]]''' |