Advantage of closed circulatory system is

Options

A. Capillaries are present
B. Blood is not coming into contact with tissues
C. Blood pressure is regulated
D. Oxygen is directly supplied to tissues

Answer

### Step-by-Step Solution:

1. **Understanding Circulatory Systems**: There are two main types of circulatory systems in animals: open and closed. In a closed circulatory system, blood is contained within blood vessels, while in an open circulatory system, blood is not confined to vessels and bathes the organs directly.

2. **Blood Flow in Closed Circulatory System**: In a closed circulatory system, the heart pumps blood through a network of vessels. This allows for efficient transport of nutrients, gases, and waste products.

3. **Regulation of Blood Pressure**: One of the major advantages of a closed circulatory system is the ability to maintain and regulate blood pressure. The blood vessels can constrict or dilate, which helps to control the flow of blood and maintain adequate pressure throughout the system.

4. **Efficient Transport**: Due to the presence of blood vessels, blood can reach further distances within the body. This ensures that oxygen and nutrients are delivered efficiently to tissues and organs.

5. **Homeostasis**: The closed circulatory system plays a crucial role in maintaining homeostasis, which is the stable internal environment of an organism. The regulated blood flow helps in the distribution of hormones and the removal of metabolic wastes.

6. **Comparison with Open Circulatory System**: In contrast, an open circulatory system does not regulate blood pressure effectively because the blood is not contained in vessels. This can lead to less efficient transport of nutrients and gases.

7. **Conclusion**: Therefore, the primary advantage of a closed circulatory system is the ability to maintain proper blood pressure, which facilitates efficient circulation and homeostasis.