Why the alimentary canal is shorter in frog?

Explanation

### Step-by-Step Solution:

1. **Understanding the Alimentary Canal**: The alimentary canal is a part of the digestive system that includes the mouth, esophagus, stomach, intestines, and anus. Its length can vary significantly among different animal species based on their dietary habits.

2. **Dietary Habits of Frogs**: Frogs are primarily carnivorous, meaning they mainly consume other animals such as insects and small invertebrates. This diet is different from herbivores, which primarily eat plant material.

3. **Comparison with Herbivores**: Herbivores have longer alimentary canals because their diet consists of fibrous plant materials, such as grass, which contain cellulose. Cellulose is difficult to digest and requires a longer digestive process, leading to a longer intestine to allow for the breakdown and absorption of nutrients.

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