Why the dialysis machine is connected to artery not vein?

Dialysis machines are connected to veins, not arteries. This is because dialysis is a process that involves filtering waste products and excess fluid from the blood. Arteries are responsible for carrying oxygenated blood away from the heart to the rest of the body, while veins are responsible for carrying deoxygenated blood back to the heart. Dialysis is performed on the venous side of the circulatory system because it allows for easier access to the blood that needs to be filtered.