Final answer:
The false statement about the heart is that it is a voluntary muscle; the heart is actually an involuntary muscle. All other statements regarding the four chambers, pumping oxygenated blood, and prevention of blood backflow by valves are true.
Step-by-step explanation:
Among the given statements about the heart, the false statement is that 'The heart is a voluntary muscle.' In fact, the heart is an involuntary muscle, meaning it operates without conscious control, and it is part of the cardiovascular system. The accurate statements are that the heart does indeed have four chambers (two atria and two ventricles), it pumps oxygenated blood to the body through the aorta, and it contains valves that prevent the backflow of blood, ensuring unidirectional blood flow through the heart and circulatory system.
These valves include the mitral and tricuspid valves between the atria and ventricles, and the semilunar valves (the aortic and pulmonary valves) that are found at the bases of the large arteries leaving the ventricles.Of the given statements about the heart, statement d) The heart is a voluntary muscle, is false. The heart is actually an involuntary muscle. It is controlled by the autonomic nervous system and beats automatically without conscious control. It contracts and relaxes rhythmically to pump blood throughout the body.