Digestive system is complete where

Options

A. Digestive glands are present
B. Digestion occurs in the cavity
C. Both mouth and anus are present
D. Digestion occurs in the individual cells

Answer

To determine where a complete digestive system is found, let's analyze the options provided step by step.

### Step-by-Step Solution:

1. **Understanding Digestive Systems**:
- A complete digestive system is characterized by having a distinct mouth for ingestion and an anus for egestion (the expulsion of waste). This allows for a one-way flow of food through the digestive tract.

2. **Evaluating the Options**:
- **Option A: Digestive glands are present**: While digestive glands (like salivary glands, liver, pancreas) are important for digestion, their presence alone does not define a complete digestive system.
- **Option B: Digestion occurs in the cavity**: This could refer to a gastrovascular cavity, which is not a complete digestive system as it has only one opening.
- **Option C: Both mouth and anus are present**: This option describes a complete digestive system accurately, as it indicates a separate entry and exit point for food.
- **Option D: Digestion occurs in the individual cells**: This refers to intracellular digestion, which is not a characteristic of a complete digestive system.

3. **Conclusion**:
- Based on the analysis of the options, the correct answer is **Option C: Both mouth and anus are present**. This indicates that the organism has a complete digestive system.

### Final Answer:
The digestive system is complete where **both mouth and anus are present** (Option C).