Heartful or heartless?
Composed by: V.N.Vikram (34)
Class: 3.13 Haggai
Have you ever wondered how the heart works? From the moment it works till the moment it stops, the human heart works tirelessly. In an average lifetime, the human heart beats for about two and a half billion times, without ever passing to rest. It is the initiator of life. In fact, it is the largest muscle in the body.
Last year, all the students had experienced how the human heart actually looks like and how it is able to sustain life during a chapter know as the human circulatory system? Naturally, you would have noticed that I have sustained an interest in cardiology and I aspire to become a cardiologist.
I would briefly tell you what makes up the heart and how blood flows through the heart.
The heart consists of four chambers- the upper two are known as the atria (be it right atrium and left atrium) and the bottom two are known as the ventricles (be it right ventricle and left ventricle). a valve connects each atium to a ventricle. A middle wall known as the septum separates the left and right side of the heart. The top of the heart connects to a few large blood vessels. The largest of these is the aorta, or main artery, which carries nutrient-rich blood away from the heart. Another important vessel is the pulmonary artery which connects the heart with the lungs as part of the pulmonary circulation system. The heart's muscle, called cardiac muscle, contracts and relaxes about 70 to 80 times per minute without you ever having to think about it. As the cardiac muscle contracts it pushes blood through the chambers and into the vessels. Nerves connected to the heart regulate the speed with which the muscle contracts. Therefore, the heart's structure enables it to pump blood around the body.
If the heart is perceived to be such an efficient development whose mysteries cannot be unravelled and discovered in days or weeks and even years, why is that cardiovascular diseases are becoming the leading cause of deaths in the world. When blood flow from the heart to the other parts of the body is decreased, the heart is over-exerted and this leads to heart disease. Fatty deposits in arteries, hypertension are also causes of heart diseases. All these can be controlled by Man. However, genetic predisposition to a heart disease cannot be solved, with today's advancements, it would be possible to actually alter the DNA sequences at the time of birth itself in the near future. So, the efficiency of the heart is not totally flawless but it all lies in the hands of Man.
Class: 3.13 Haggai
Have you ever wondered how the heart works? From the moment it works till the moment it stops, the human heart works tirelessly. In an average lifetime, the human heart beats for about two and a half billion times, without ever passing to rest. It is the initiator of life. In fact, it is the largest muscle in the body.
Last year, all the students had experienced how the human heart actually looks like and how it is able to sustain life during a chapter know as the human circulatory system? Naturally, you would have noticed that I have sustained an interest in cardiology and I aspire to become a cardiologist.
I would briefly tell you what makes up the heart and how blood flows through the heart.
The heart consists of four chambers- the upper two are known as the atria (be it right atrium and left atrium) and the bottom two are known as the ventricles (be it right ventricle and left ventricle). a valve connects each atium to a ventricle. A middle wall known as the septum separates the left and right side of the heart. The top of the heart connects to a few large blood vessels. The largest of these is the aorta, or main artery, which carries nutrient-rich blood away from the heart. Another important vessel is the pulmonary artery which connects the heart with the lungs as part of the pulmonary circulation system. The heart's muscle, called cardiac muscle, contracts and relaxes about 70 to 80 times per minute without you ever having to think about it. As the cardiac muscle contracts it pushes blood through the chambers and into the vessels. Nerves connected to the heart regulate the speed with which the muscle contracts. Therefore, the heart's structure enables it to pump blood around the body.
If the heart is perceived to be such an efficient development whose mysteries cannot be unravelled and discovered in days or weeks and even years, why is that cardiovascular diseases are becoming the leading cause of deaths in the world. When blood flow from the heart to the other parts of the body is decreased, the heart is over-exerted and this leads to heart disease. Fatty deposits in arteries, hypertension are also causes of heart diseases. All these can be controlled by Man. However, genetic predisposition to a heart disease cannot be solved, with today's advancements, it would be possible to actually alter the DNA sequences at the time of birth itself in the near future. So, the efficiency of the heart is not totally flawless but it all lies in the hands of Man.
posted by Nikhil Srinidhi at 4:23 AM
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