The heart consists of four chambers in which blood flows. Blood enters the right atrium and passes through the right ventricle. The right ventricle pumps the blood to the lungs where it becomes oxygenated. The oxygenated blood is brought back to the heart by the pulmonary veins which enter the left atrium. From the left atrium blood flows into the left ventricle
False because you are born with a birth mark
if you look it up an y0utoob it will give you multiple videos about it ok.
The answer is D. Having Autoimmune Disease, the body doesn’t not recognize your own cells and foreign cells
