👉 The term "veins" in this context refers to the blood vessels that carry deoxygenated blood from the body's tissues back to the heart. Unlike arteries, veins have thinner walls and larger diameters, making them less efficient at transporting blood against gravity. They rely on muscle contractions, skeletal movements, and valves to help push blood back up towards the heart. The presence of valves in veins prevents the backflow of blood, ensuring a one-way flow towards the heart.
