The human heart is a vital organ that pumps blood throughout the body. It is a complex organ made up of several chambers, valves, and blood vessels that work together to maintain circulation. Here is a detailed description of how the human heart works.



The human heart is a muscular organ located in the chest cavity. It is roughly the size of a fist and is divided into four chambers: the right atrium, right ventricle, left atrium, and left ventricle. The heart is surrounded by a protective sac called the pericardium and is connected to the rest of the body by a network of blood vessels.



The heart has four valves that control the flow of blood through the chambers. These valves are the tricuspid valve, pulmonary valve, mitral valve, and aortic valve. The tricuspid valve separates the right atrium from the right ventricle, while the pulmonary valve separates the right ventricle from the pulmonary artery. The mitral valve separates the left atrium from the left ventricle, and the aortic valve separates the left ventricle from the aorta.



The heart works by contracting and relaxing in a rhythmic pattern, which pumps blood through the circulatory system. The right atrium receives deoxygenated blood from the body and pumps it into the right ventricle. The right ventricle then pumps this blood into the lungs, where it picks up oxygen and releases carbon dioxide. The oxygenated blood then flows from the lungs into the left atrium. The left atrium pumps the blood into the left ventricle, which then pumps it out to the rest of the body through the aorta.



The heartbeat is controlled by a group of cells called the sinoatrial (SA) node, which is located in the right atrium. The SA node sends electrical signals to the rest of the heart, which causes it to contract and pump blood. The heart beats an average of 60-100 times per minute, depending on the individual's age, physical condition, and activity level.



The human heart is an amazing organ that works tirelessly to keep blood circulating throughout the body. By understanding how the heart works, we can take better care of our cardiovascular health and prevent heart disease.

Heart is the muscular organ located in the chest cavity.It is slightly situated tilted towards left.structure:HuMan heart is divided into two halves.each side of heart has two chamber.The two upper chambers are called atria or auricles and two lower chambers are called ventricles.There are valves between the auricles and the ventricle on each side. The right auricle opens into the right ventricle and the left auricle into left ventricle. There are no valves between two auricles or ventricles. As a result, the blood in the right side of heart remains completely separated from left side of heart.the valves allow blood to flow only in one direction and there is no mixing of oxygenated blood ( rich in oxygen) with deoxygenated blood.( rich in CO2).Function:The heart acts as pump and brings about movement of blood in the body.All the atria and ventricles of the heart contract and relax at appropriate times and makes the heart behave like pump.since ventricles have to pump blood into various organs with high pressure they have thicker walls than atria.Arteries , veins and capillaries are called as blood vessels