Circulatory system does not help in

Options

A. transport of respiratory gases
B. transport of hormones
C. transport of food materials
D. transfer of impulses

Answer

To answer the question "Circulatory system does not help in," we will analyze the options provided and understand the functions of the circulatory system.

### Step-by-Step Solution:

1. **Understanding the Circulatory System**:
- The circulatory system is responsible for the movement of blood throughout the body. It consists of the heart, blood vessels, and blood.

2. **Analyzing Each Option**:
- **Option A: Transport of respiratory gases**: The circulatory system plays a crucial role in transporting oxygen from the lungs to the body cells and carbon dioxide from the cells back to the lungs. Thus, this option is incorrect as the circulatory system does help in this function.

- **Option B: Transport of hormones**: Hormones are secreted by glands and enter the bloodstream, where they are transported to various organs and tissues. The circulatory system is essential for this function as well. Therefore, this option is also incorrect.

- **Option C: Transport of food materials**: After digestion, nutrients from food are absorbed into the bloodstream and transported to cells throughout the body. This is another function of the circulatory system, making this option incorrect too.

- **Option D: Transfer of impulses**: The transfer of impulses, such as nerve signals, is primarily the function of the nervous system, specifically through neurons. The circulatory system does not play a role in this process.

3. **Conclusion**:
- Based on the analysis, the circulatory system does not help in the transfer of impulses. Therefore, the correct answer is **Option D**.

### Final Answer:
**The circulatory system does not help in the transfer of impulses (Option D).**

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