The muscle of the left side of your heart is larger and thicker than the right one because the left part of your heart has to pump blood to your whole body, while the right part only has to pump blood to your lungs. More work needs bigger muscles.
the left side of the heart is thicker because it has to pump blood to the rest of the body unlike the right who only has to pump blood to the lungs.
left side
Because it pumps blood to the whole body
The left side of the heart has larger muscle.
The left ventricle (the lower chamber on the left side of your heart).
The bulk of the heart rests on the Left side of this heart.
not enough blood flow
Human heart pumps the blood all around the body. The left side of the heart is thicker than then the right side because the left side has to pump the blood all around the body or shall I say long distance from heart. The right side don't require thick muscles as it just have to pump the blood to the adjacent lung. Veins contain valves which prevents the back flow of the blood and thus help the flow of blood around the whole body.
the nerves in our muscles gives a message and thats how muscles go thicker and shorter
yes
A boys muscles and penis become thicker once he has begun puberty.
Heart muscles are involuntary.
The heart IS a muscle. If you're talking about skeletal muscles, then they are not all at the top of your heart (because what about your abdominal muscles, thigh muscles, calf muscles, etc?)