The left and the right sides of the heart both have the atria at the upper side and a ventricle on the lower part. The left and the right-hand sides of the heart receive blood and pump the blood out of the heart for different purposes. However the left hand side receives only oxygenated blood to be pumped to the entire body while the right hand side receives deoxygenated blood to be pumped to the lungs via pulmonary artery. The left-hand side is also larger and thicker than the right-hand side of the heart. The papillary muscles are attached on the ventricle walls in the anterior and posterior mitral valve. The function of the papillary muscles is to prevent prolapse of the anterior and posterior
