Blood vessel elasticity refers to the ability of blood vessels, particularly arteries, to stretch and recoil in response to changes in blood pressure. When the heart pumps blood, it creates pressure that causes the arteries to expand. This elasticity helps maintain a steady flow of blood throughout the body, ensuring that organs receive the oxygen and nutrients they need. As we age or due to certain health conditions, the elasticity of blood vessels can decrease, leading to stiffer arteries. This can increase the risk of hypertension and other cardiovascular issues, making it important to maintain healthy blood vessel function through lifestyle choices and medical care.