What is one of the major functions of the circulatory system?

One of the major functions of the circulatory system is delivering nutrients. The circulatory system comprises the heart, blood vessels, and blood, which work together to transport essential substances throughout the body. Nutrients obtained from food, including carbohydrates, proteins, fats, vitamins, and minerals, are absorbed into the bloodstream after digestion. The circulatory system is responsible for carrying these vital nutrients to cells, tissues, and organs, where they are used for energy, growth, and repair.

This function is crucial because without an effective means of transport for nutrients, the body's cells would be unable to function properly, leading to various health issues. The efficient delivery of oxygenated blood, which carries glucose and other nutrients, supports metabolic processes and helps maintain overall health. In contrast, functions such as regulating temperature, producing hormones, and filtering toxins do play roles in the body's overall homeostasis but are not as central to the fundamental purpose of the circulatory system as nutrient delivery.