The main function of blood vascular system in cockroach is
(a) Distribution of oxygen
(b) Distribution of absorbed nutrients
(c) Distribution of heat
(d) All of these

Options

A. Distribution of oxygen
B. Distribution of absorbed nutrients
C. Distribution of heat
D. All of these

Answer

To determine the main function of the blood vascular system in cockroaches, we will analyze each option provided in the question.

1. **Understanding the Blood Vascular System**:
- The blood vascular system in cockroaches is primarily composed of a fluid called hemolymph, which serves multiple functions in the body.

2. **Analyzing Each Option**:
- **Option (a) Distribution of oxygen**:
- Cockroaches do not have a blood vascular system that primarily functions to distribute oxygen. Instead, they have a tracheal system that directly delivers oxygen to tissues.
- **Option (b) Distribution of absorbed nutrients**:
- The blood vascular system (hemolymph) plays a crucial role in transporting absorbed nutrients from the digestive system to various parts of the body.
- **Option (c) Distribution of heat**:
- While the blood vascular system may help in regulating temperature to some extent, it is not its primary function.
- **Option (d) All of these**:
- Since options (a) and (c) are not the main functions of the blood vascular system, this option cannot be correct.

3. **Conclusion**:
- Based on the analysis, the main function of the blood vascular system in cockroaches is the distribution of absorbed nutrients, which corresponds to **Option (b)**.

Therefore, the correct answer is **(b) Distribution of absorbed nutrients**.