Which of the following does NOT describe the function of the cardiovascular system?

The cardiovascular system is primarily responsible for the transportation of substances throughout the body, including oxygen, nutrients, hormones, and waste products. One of its crucial functions is to transport oxygen to tissues, ensuring that cells receive the necessary oxygen for metabolism. Additionally, it plays a key role in regulating blood pressure, which is vital for maintaining adequate blood flow and ensuring that all organs receive the required blood supply.

Another important function of the cardiovascular system is maintaining fluid balance. The system helps in regulating the distribution of body fluids and ensures that blood volume and pressure are adequately maintained to support overall bodily functions.

The role of regulating immune responses, however, is primarily attributed to the lymphatic system and the immune system, rather than the cardiovascular system itself. While the cardiovascular system does transport immune cells and factors, it does not directly regulate immune responses, making this option the one that does not accurately describe a function of the cardiovascular system.