What are the main functions of the cardiovascular system?

The cardiovascular system plays a critical role in maintaining the overall homeostasis of the body through several key functions. Primarily, it is responsible for transporting essential substances such as nutrients, oxygen, and hormones to cells throughout the body. This transportation is vital for cellular metabolism and overall health.

Additionally, the cardiovascular system facilitates the removal of waste products, such as carbon dioxide and other metabolic byproducts, from the cells. This process is crucial for preventing toxic accumulation within the body and supports the overall metabolic functions.

While the regulation of body temperature and fluid balance does involve the cardiovascular system as part of its broader functions, they are not the primary roles attributed to it. Thus, the comprehensive function that encompasses transportation and waste removal is what makes this choice accurate and reflective of the multifaceted nature of the cardiovascular system's duties.