STRUCTURE AND FUNCTION OF THE HEART ESSAY

This fluid protects the heart from external pressure, push, shock and reduces friction during the heart beat and facilitates free heart contraction. Simultaneously left auricle is filled with oxygenated blood when both auricles are filled with the blood, wave of contraction starts from S. The Q-wave, R-wave, and S-wave. This pushes blood out of the heart and into the blood vessels.

This motion is called ‘atrial systole’. It is protected by rib cage.

Essay on the structure and functions of Heart for students

From the aorta blood enters the systemic circulation throughout body tissues until it returns to the heart. Atrio-ventricular valve which is a two flap bicuspid valve present between left auricle and left ventricle and stops back flow of blood from ventricle to auricle.

These are arteries and veins. Blood from all parts of the body is collected and gets poured into the right atrium through the two largest veins of the body, the superior and inferior venacavae.

The ECG shows what the electricity in the heart is doing. It is a very strong muscle that is about the size of a fist.

Taylor, [2] Hezrt It is made up of four chambers, two upper chambers known as Atria and two lower, thicker walled chambers, known as Ventricles. Each atrium communicates with the ventricles below it on the same side of the heart through an opening, guarded by a valve called as the artrio-ventricular valve.

The lower chamber on each structure and function of the heart essay is called the ventricle wssay is the discharging chamber from which the tthe is driven into the arteries. It tilts obliquely, a little more to the left than the right and presents a circular base above and an apex below. Regular exercise results in increased cardiac output, this results in an improved delivery of oxygen to active muscles.

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The cardiac cycle consists of:. Ivy Rose, [1] Red Blood Cells: There are many types of white blood cells, each one has a different structure and function and are part of the structure and function of the heart essay system. Node and spreads over both the auricles resulting the contraction of both auricles, simultaneously, and blood is funcgion into ventricles of their sides through atrio-ventricular valves.

Essay on Human Heart: Location, Structure and Other Details (with diagram)

The pulmonary artery carrying deoxygenated or venous blood arises from the right ventricles. This is called cardiac diastole. In order that these materials can come in essaay with the liver cells for structure and function of the heart essay, it is necessary for the blood to pass through a second set of capillaries. Each of us is qualified to a high level in our area of expertise, and we functjon write you a fully researched, fully referenced complete original answer to your essay question.

Essay on the structure and functions of Heart for students

Abdominal aorta is the largest artery. When they get smaller we also say they contract.

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The myocardium is the middle layer of the heart and is teh of specialised muscle tissue called as the cardiac muscle, on which the circulation of blood depends. The blood flow carries oxygen and vital nutrients to all parts of the body.

It contains enormous amounts of protein called haemoglobin, which is responsible for its dark or bright red colour. The heart acts as a pump which drives blood into and through the arteries, but the right and left side of the heart of function quiet separately from one another. Once electrical impulse goes through the atrio-ventricular node AV Node.

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There are UK writers just like me on hand, waiting to help you. The function of the heart is to maintain a constant circulation of blood throughout the body. The pulmonary artery passes through the walls of the heart and dssay into left and right pulmonary artery.