An Essay on the Human Heart

Document details
Category: Healthcare and Medicine Essay
Subcategory: Film and Movies
Words: 3447
Pages: 5

The Human Heart Abstract Dorlands Illustrated Medical Dictionary defines the heart as "the viscus of cardiac muscle that maintains the circulation of the blood". It is divided into four cavities two atria and two ventricles. The left atrium receives oxygenated blood from the lungs. From there the blood passes to the left ventricle, which forces it via the aorta, through the arteries to supply the tissues of the body. The right atrium receives the blood after it has passed through the tissues and has given up much of its oxygen. The blood then passes through the right ventricle into the lungs where it gets oxygenated. There are four major valves in the heart the left atrioventricular valve (also known as the mitral or bicuspid valve), the right atrioventricular valve (tricuspid), aortic valve, and the pulmonary valve. The heart tissue itself is nourished by the blood in the coronary arteries.2 Position of the Heart Within the Body The heart is placed obliquely in the chest. The two atria are directed upwards and backwards to the right and are at the level of the fifth through the eight dorsal vertebrae. The apex of the heart points downwards and forwards to the left and corresponds to the interspace between the fifth and sixth ribs, two inches below the left nipple. Its atrial border corresponds to a line drawn across the sternum on a level with the upper border of the third costal cartilage. Its lower border (apex) corresponds to a line drawn across the lower end of the same bone, near the xiphoid process. Its upper surface is rounded and convex, directed upwards and forwards, and formed mainly by the right ventricle and part of the left ventricle. The posterior surface of the heart is flattened and rests upon the diaphragm muscle. Of its two borders, the right is the longest and thinnest, the left is shorter but thicker and round. Size In an adult, the...

“A good sample is better than the advice"
Hire EliteEssayWriters to Write Your Assignment!
similar examples
The Effects of Playing Video Games on the Human Heart
1371 words
4 pages
Video Games Effect On HeartIn order to determine the effects of video games on the heart, we must look atseveral different things. First, we must determine which specific areas we wantto investigate. Looking at increased heart rate and blood pressure, we need todetermine the average maximum heart rate for the ...
An Overview of the Anatomy and Function of the Human Heart
3470 words
13 pages
Human HeartAbstractDorland's Illustrated Medical Dictionary defines the heart as the viscus of cardiac muscle that maintains the circulation of the blood. It is divided into four cavities two atria and two ventricles. The left atrium receives oxygenated blood from the lungs. From there the blood passes to the left ventricle, ...
An Analysis of the Angina Pectoris on the Human Heart
5766 words
23 pages
Angina Pectoris CONTENTS 3 Introduction 4 The Human Heart 5 Symptoms of Coronary Heart Disease 5 Heart Attack 5 Sudden Death 5 Angina 6 Angina Pectoris 6 Signs and Symptoms 7 Different Forms of Angina 8 Causes of Angina 9 Atherosclerosis 9 Plaque10 Lipoproteins10 Lipoproteins and Atheroma11 Risk Factors11 Family ...
An Essay on Human Heart Transplantation
1935 words
3 pages
Picture this. A man is involved in a severe car crash in Florida which has left him brain-dead with no hope for any kind of recovery. The majority of his vital organs are still functional and the man has designated that his organs be donated to a needy person upon ...
An Analysis of Words Murdering the Human Heart
535 words
1 pages
I believe that words can indeed murder the human heart. All too often I see someone put another kid down because of something he did wrong. It can be as little as tripping on the stairs and someone yelling "You clux. Man are you dumb." This can be considered a ...
The Human Heart and Its Rhythmic Problems
2768 words
4 pages
The heart is bestowed with a specialized system that automatically generates rhythmic control via the sinus node, located in the superior lateral wall of the right atrium near the opening of the superior vena cava. The specialized pacemaker cells dictate control of the rest of the heart through regular electrical ...
GET EVEN A BETTER ESSAY!
It's a lifetime discount time!
15% off
Save this discount code:
15OFFJUST4U