👉 Veins are blood vessels that carry deoxygenated blood from the body's tissues back to the heart. They have thinner walls and larger diameters than arteries, making them more prone to swelling and varicose veins. Unlike arteries, veins rely on muscle contractions and valves to push blood upward against gravity. Veins in the legs are particularly susceptible to issues like blood clots due to gravity's effect on blood flow.
