In humans, starch digestion begins in buccal cavity but stops in stomach. Why?

Explanation

**Step-by-Step Solution:**

1. **Understanding Starch Digestion**: Starch digestion begins in the buccal cavity (mouth) where the enzyme salivary amylase, secreted by the salivary glands, breaks down starch into simpler sugars like maltose.

2. **Role of Salivary Amylase**: Salivary amylase is effective in the neutral pH of the mouth (around 7). It initiates the process of starch digestion as food is chewed and mixed with saliva.

3. **Transition to the Stomach**: Once the food is swallowed, it moves down the esophagus and enters the stomach. Here, the environment changes drastically.

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