The general pattern of blood circulation in a mammal. Names are required only of the coronary arteries and of blood vessels entering and leaving the heart, liver and kidneys.

Mammals have a double circulatory system, this means that there are two different sides of the heart pumping to two different places (the lungs and the rest of the body.)

We need a system like this because mammals are so large and so things need to be transported long distances and we are have a fairly high metabolic rate so we need a lot of oxygen transported.

Heart
The vein that brings blood into the heart from the body is called the vena cava.
The artery that takes blood out of the heart and to the lungs is the pulmonary artery.
The vein that brings blood into the heart from the lungs is the pulmonary vein.
The artery that takes blood out of the heart is called the aorta.

Liver
The hepatic artery brings blood in.
The hepatic vein takes blood out.
The vein that brings blood to the liver from the stomach is the hepatic portal vein.

Kidneys
The renal artery brings blood in.
The renal vein takes blood out.