1.) structure: The heart is a muscular organ roughly the size of a fist,located slightly left of the chest. it has four chambers:

. right atrium and left atrium (upper chambers)

. right ventricle and left ventricle) (lower chambers)

2.) function:

. The right side of the heart pumps deoxygenated blood to the lungs,where it gets oxygenated.

. The left side pumps oxygenated blood to the rest of the body

3.) Heart beat: The heart beats about 60-100 times per minute in a healthy adult at rest. the rhythm is controlled by electrical signal that orginate in the sinoatrial (SA) node,which acts as the natural pacemaker of the heart.

4.) circulatory system: The heart is part of the circulatory system,which consists of the blood vessels and the blood itself. it works closely with the arteries,veins,and capillaries to ensure the efficient

5.) Health: A healthy heart is essential for overall well being conditions such as covonary artery disease,heart attacks,arrhythmias,and heart failure can negatively affect heart function