Veins and arteries are blood vessels which are responsible for transporting blood throughout the body.
Veins: - Blue blood vessels that bring blood back to the heart and drain blood from organs and limbs - Has a thin elastic muscle layer with semilunar valves that prevent the blood from flowing in the opposite direction - Can be categorized into four main types: pulmonary, systemic, superficial, and deep veins
Arteries: - Red blood vessels that carry blood away from the heart - Has a thick elastic muscle layer that can handle high pressure of the blood flowing through the arteries - Each artery is a muscular tube lined by smooth tissue and has three layers: the intima, the media, and the adventitia