The primary purpose of the circulatory system is to transport blood, nutrients, gases, and waste products throughout the body. It plays a crucial role in maintaining homeostasis by distributing oxygen and nutrients to cells and tissues while removing carbon dioxide and other metabolic wastes. The circulatory system consists of the heart, blood vessels, and blood. The heart pumps oxygen-rich blood from the lungs and nutrient-rich blood from the digestive system, while veins return deoxygenated blood back to the heart. This continuous flow is essential for sustaining life and supporting various bodily functions.