Which of the six fundamental digestive processes refers specifically to the entry of food into the alimentary canal through the mouth?

1. The digestive system carries out six fundamental activities in sequence. 2. The first, ingestion, refers to the entry of food into the alimentary canal through the mouth. 3. Propulsion then moves this food along the tract, and later absorption transfers nutrients into the bloodstream before defecation removes waste. 4. Propulsion, absorption, and defecation are each distinct, later steps in the sequence rather than the initial entry of food. _Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 23 "The Digestive System", section 23.2, p. 1094_