Recall where digestion begins.stomachoesophagusmouthsmall intestineI'm not sure

Step 1: Break Down the Problem

To determine where digestion begins, we need to analyze the functions of different parts of the digestive system. The options provided include the stomach, esophagus, mouth, and small intestine.

Step 2: Relevant Concepts

Digestion involves both mechanical and chemical processes. The primary areas of interest are:

1. Mouth: Mechanical digestion (chewing) and the enzymatic breakdown of carbohydrates (salivary amylase).
2. Esophagus: Primarily a conduit for food; no significant digestion occurs here.
3. Stomach: Engages in chemical digestion (e.g., gastric juices) and mechanical mixing of food.
4. Small Intestine: Continues digestion and is the primary site for nutrient absorption.

Step 3: Analysis and Detail

1. Mouth: Digestion starts here with the physical breakdown of food and initial enzymatic action.
2. Esophagus: Food passes through without any digestion occurring.
3. Stomach: Continues the process but is not where digestion first begins.
4. Small Intestine: It plays a crucial role in digestion but not the initiation.

Step 4: Verify and Summarize

The initial stage of digestion begins in the mouth, where food is mechanically and chemically processed before moving through the rest of the digestive system.

Final Answer

Digestion begins in the mouth.