CHAPTER VI.

DIGESTION 80

_The Principal Processes of Nutrition--The General Plan of Digestion-- Mastication--The Teeth--Preservation of the Teeth--Insalivation--The Stomach and the Gastric Juice--The Movements of the Stomach--Gastric Digestion--The Intestines--The Bile and Pancreatic Juice--Intestinal Digestion--Absorption by means of Blood-vessels and Lacteals--The Lymphatic or Absorbent System--The Lymph--Conditions which affect Digestion--The Quality, Quantity, and Temperature of the Food--The Influence of Exercise and Sleep._