vascular structures

Vascular structures are the network of blood vessels in the body, including arteries, veins, and capillaries. Arteries carry oxygen-rich blood from the heart to tissues; veins return oxygen-poor blood back to the heart. Capillaries are tiny vessels where blood exchanges nutrients, oxygen, and waste with body cells. These vessels are essential for maintaining circulation, delivering nutrients, and removing waste, supporting overall health and function. Their structure varies to suit their roles, with thick walls in arteries to withstand pressure and thinner walls in veins and capillaries for efficient blood flow and exchange.