Essay heart human

working of heart

Node and spreads over both the auricles resulting the contraction of both auricles, simultaneously, and blood is pushed into ventricles of their sides through atrio-ventricular valves. The heart of a resting human being pumps about 5 litres of blood per minute. The wonder is only increased when we look upon the heart in an Aristotelian sense, as something created and working towards a function, where every part is there for a reason.

Aorta: It arises from left ventricles and carries oxygenated blood to supply it to all body parts.

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Now both the ventricles contract simultaneously causing pressure of blood contained in them, blood of right ventricle is forced in pulmonary artery through semilunar valves, this valve prevent the backflow of the blood to the lungs for gaseous exchange, oxygenation and carbon dioxide removal and also provide nutrition to the lungs after this oxygenated blood comes to left auricle through pulmonary vein.

It does this by branching into smaller arteries—diagonal and septal branches. When ECG of a person is to be recorded, four leads metal electrodes are attached in the arms and legs. Anglin, The circulatory system is pumped by the heart and always circulates through the body in the same direction.

Essay on heart feelings

The atria are demarcated externally from the ventricles by an oblique groove called atrioventricular sulcus. Therefore, ECG is of great diagnostic value in cardiac diseases. They have thin walls, only one cell thick which allows them to perform their job more effectively. This allows our team to focus on improving the library and adding new essays. This fluid protects the heart from external pressure, push, shock and reduces friction during the heart beat and facilitates free heart contraction. We need oxygen to breath and nutrient to maintain our health. Its gentle thumping accompanies us for the duration of our lives, and it is so central to human existence that for much of recorded history, it has served as a symbol of not only life but also love, emotion, intelligence, and reason. But there is no flow of blood from the ventricles to the aorta and pulmonary trunk as the semilunar valves remain closed. When citing an essay from our library, you can use "Kibin" as the author. Atrio-ventricular valve tricuspid which is a three flap valve present between the right auricle and right ventricle, stops back flow of blood from ventricles to auricle. During exercise both the number of beats per minute and the amount of blood pumped per beat are greatly increased. Essay 3. Pulse: Pulse is the rhythmic contraction and relaxation in the aorta and its main arteries. It is done after cleaning and putting a special jelly, which improves electrical conduction. Now both the ventricles contract simultaneously causing pressure of blood contained in them, blood of right ventricle is forced in pulmonary artery through semilunar valves, this valve prevent the backflow of the blood to the lungs for gaseous exchange, oxygenation and carbon dioxide removal and also provide nutrition to the lungs after this oxygenated blood comes to left auricle through pulmonary vein.

It means the heart beat originates from a muscle, however, it is regulated by the nerves. It is done after cleaning and putting a special jelly, which improves electrical conduction.

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The Heart Essay examples