what is heart!?what is it function? and structure
Answers
ABOUT HEART--: ) : ) : )
As a central part of the circulatory system, the heart is primarily responsible for pumping blood and distributing oxygen and nutrients throughout the body. Because of this task, the heart may be considered one of the most important organs of the body, such that even small dysfunctions or abnormalities may cause drastic changes or effects in the human organism.
The heart is a muscle whose working mechanism is made possible by the many parts that operate together. The organ is divided into several chambers that take in and distribute oxygen-poor or oxygen-rich blood. These chambers are accompanied by veins and arteries that facilitate the same function. With all of its parts working together towards the same goal, the heart successfully pumps blood with ease.
Normally, a good-functioning adult heart could go on three cardiac cycles or 72 beats per minute. This rate changes for children whose heart rates are normally and relatively faster.
Function of the Heart
The heart is the main organ in the circulatory system, the structure primarily responsible for delivering the circulation of blood and transportation of nutrients in all parts of the body. This continuous task uplifts the role of the heart as a vital organ whose normal operation is constantly required.
The heart’s blood-pumping cycle, called cardiac cycle, ensures that blood is distributed throughout the body. The oxygen distribution process begins when oxygen-free blood enters into the heart through the right atrium, goes into the right ventricle, enters the lungs for oxygen refill and release of carbon dioxide, and transfers into the left chambers, ready for redistribution. About 5.6 liters of blood circulate the body and three cardiac cycles are completed per minute.
The performance of the heart could now be easily monitored when any cardiovascular problem or disorder is suspected. For instance, a regularly abnormal heartbeat or beats per minute are characteristic of a heart-related illness. This is because a heartbeat is a manifestation of the oxygen-reloading process in the heart that is made up of two phases.
The systole is a short period that occurs when the tricuspid and mitral valves close; the diastole is a relatively longer period when the aortic and pulmonary valves close. The systole-diastole relationship is the reference in measuring blood pressure. Other ways of physically determining the regular functioning of the heart is through examining the pulse rate (beats per minute). A normal heart rate of an adult is at 72 beats per minute, while children normally yield higher heart rates.
Answer:
Explanation:
The heart is hollow , muscular and conical organ located in the rib-cage in between the lungs it has four Chambers two upper and two lower the upper chamber are called auricle or atria. The two lower Chambers are called ventricles. All the four Chambers are connected to artries and veins. A tissue called septum completely separates the right and left sides of the heart. The lower and upper Chambers of the heart are separated by two valves
The heart is composed of cardiac muscles the thickness of the wall in different heart Chambers reflects this function . The artria are thinly muscled because they pump the blood to short distance to the ventricles below them. The right ventricles is more heaviely muscled thn either of the atria because it has to force blood much farther distance of the lungs the left ventricle has the thickest wall because it has to force the blood to all the way round the body.
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