Question

what is difference between arteries and veins

Answer 1

Veins:
carry blood from the tissues of the body back to the heartare usually positioned closer beneath the surface of the skinare less muscular than arteries, but contain valves to help keep blood flowing in the right direction, usually toward the heartwould collapse if blood flow stops.

Arteries:
carry blood away from the heart to the tissues of the bodyare usually positioned deeper within the bodyare more muscular than veins, which helps in transporting blood that is full of oxygen efficiently to the tissueswould generally remain open if blood flow stopped, due to their thick muscular layer.

Answer 2

Arteries transfer Oxygenated blood meaning blood having more oxygen and less Carbon dioxide while vein carries less oxygen and more carbon dioxide.
The lumen of vein is larger and thus blood is less pressurized so it need a valve to prevent backflow. Arteries have thin lumen and strong wall so blood can flow in high pressure.
Keep in mind that only Umbilical and Pulmonary arteries and veins perform task opposite ly. Like the pulmonary artery does the function of brain.
Also arteries carries nutrients like glucose while vein carries waste like urea