Vascular compliance refers to the ability of blood vessels, particularly arteries and veins, to expand and contract in response to changes in blood pressure. When blood pressure increases, compliant vessels can stretch to accommodate the extra volume, helping to maintain steady blood flow. Conversely, when blood pressure decreases, these vessels can return to their original shape, ensuring that blood continues to circulate effectively. High vascular compliance is important for overall cardiovascular health, as it allows the heart to pump blood efficiently. Factors such as age, hypertension, and atherosclerosis can reduce vascular compliance, leading to increased strain on the heart and potential health issues.