The vascular system, also known as the circulatory system, is a network of blood vessels that transport blood throughout the body. It consists of three main types of vessels: arteries, veins, and capillaries. Arteries carry oxygen-rich blood away from the heart, while veins return oxygen-poor blood back to the heart. Capillaries are tiny vessels where the exchange of oxygen, nutrients, and waste occurs between blood and tissues. The vascular system plays a crucial role in maintaining homeostasis by regulating blood flow and pressure. It works closely with the heart, which pumps blood, and the lymphatic system, which helps remove excess fluids and waste. Together, these systems ensure that all body tissues receive the necessary substances for proper function.