ANATOMY

Detailed explanation-1: -The circulatory system is made up of blood vessels that carry blood away from and towards the heart. Arteries carry blood away from the heart and veins carry blood back to the heart.

Detailed explanation-2: -Veins bring blood to the right side of your heart. Pulmonary arteries carry the blood to your lungs, where it receives oxygen. Pulmonary veins move the blood oxygen-rich blood to the left side of your heart.

Detailed explanation-3: -A network of arteries and veins also carry blood throughout the body: Arteries transport blood from the heart to the body tissues. Veins carry blood back to the heart.

Detailed explanation-4: -Your blood enters your venules before joining up with your veins. Your veins then carry your blood back to your heart where it can refuel. This oxygen-poor blood enters your heart through two large veins called your superior vena cava and inferior vena cava.