Vascular structures refer to the network of blood vessels in the body, including arteries, veins, and capillaries. These vessels are responsible for transporting blood, which carries oxygen and nutrients to tissues and organs while removing waste products. The heart plays a crucial role in pumping blood through this intricate system. Arteries carry oxygen-rich blood away from the heart, while veins return oxygen-poor blood back to it. Capillaries, the smallest blood vessels, facilitate the exchange of gases, nutrients, and waste between blood and surrounding tissues. Together, these vascular structures are essential for maintaining overall health and proper bodily function.