which organ has incoming arteries with both oxygenated and deoxygenated blood
Use two different colours  one for blood rich in oxygen (oxygenated blood) and the other for blood low in oxygen (deoxygenated blood). You can see from the diagram that there are two main arteries connected to the heart. The aorta carries oxygenated blood to the body. The pulmonary artery carries deoxygenated blood to the lungs and it is the only artery to carry deoxygenated blood. There are two veins associated with the heart. The vena cava, or great vein, carries deoxygenated blood back to the heart from the body.