AP BIOLOGY

Detailed explanation-1: -The first of these processes, ingestion, refers to the entry of food into the alimentary canal through the mouth. There, the food is chewed and mixed with saliva, which contains enzymes that begin breaking down the carbohydrates in the food plus some lipid digestion via lingual lipase.

Detailed explanation-2: -Ingestion – the taking in of food Food is taken into the mouth where it is physically broken down by the teeth into smaller pieces. The presence of food in the mouth triggers a nervous reflex that causes the salivary glands to deliver a watery fluid called saliva to the mouth.

Detailed explanation-3: -Ingestion can be referred to as an organism’s consumption of a substance. In the case of human beings, when the food is taken in from the mouth and then masticated and swallowed for further processing, it is called ingestion.

Detailed explanation-4: -Figure 2. The digestive processes are ingestion, propulsion, mechanical digestion, chemical digestion, absorption, and defecation.