The circulatory system contains the heart and blood vessels. The heart pumps oxygen-rich blood through the arterial parts of the body.
Veins are the vessels that carry blood from various parts of the body back to the heart.
Arteries and veins are connected by tiny capillaries . This is called the systemic circulation . The right side of the heart receives dark bluish blood from the superior and inferior vena cava. The bright red oxygenated blood returns to the left side of the heart, which pumps it out through the aorta to be distributed by smaller arteries to all parts of the body. Inc. All rights reserved.