Which part of the alimentary canal is involved in :
killing of bacteria?

Explanation

### Step-by-Step Solution:

1. **Understanding the Alimentary Canal**: The alimentary canal is a part of the digestive system that extends from the mouth to the anus. It includes several key organs: the mouth, esophagus, stomach, small intestine, large intestine, and anus.

2. **Identifying the Role of Each Part**: Each part of the alimentary canal has specific functions. The mouth is involved in the initial breakdown of food, the esophagus transports food to the stomach, and the stomach plays a crucial role in digestion.

3. **Focusing on the Stomach**: Among all the parts of the alimentary canal, the stomach is particularly important for killing bacteria. It is a muscular organ that mixes food with gastric juices.

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