1 The heart is a muscular organ found in all animals with a circulatory system. The heart pumps blood throughout the blood vessels by contractions. Cardiac means “related to the heart”‚ and comes from the Greek. The vertebrate heart is made up of cardiac muscle‚ it’s an involuntary striated muscle tissue found only in this organ‚ and connective tissue. The male’s heart weighs 9-11 ounces‚ and the female’s heart weighs about 11-12 ounces. A person’s blood pressure has major effects on their heart;
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SURFACE VIEW OF HEART Position‚ Shape and Size of the Heart: The human heart is located between the lungs in the thoracic cavity (i.e. it is not situated on the left side of the chest). The heart is a hollow‚ fibro-muscular organ and is somewhat conical in shape. It is about the size of one’s fist‚ measures about 12 cm in length and 9 cm in breadth. Its weight is about 300 g in an adult. The heart is enclosed in pericardium (a double- layered membranous sac). It protects the heart from mechanical
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those who commit harmful deeds and expect to feel glory instead of feeling guilty. In other words‚ those people will surely be surprised to find that guilt is following closely behind‚ lurking in the dark shadows of their heart. Edgar Allan Poe’s short story‚ The Tell-Tale Heart‚ presents the reader with a main character much like this. In this story‚ there is a troubled man who has been stereotyped as a crazy person in the past. However‚ he insists that he is not; he is simply advanced in his senses
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Throughout the novel Heart of Darkness Conrad uses the motif of the heart to thoroughly explain how dark people and places really can be. Conrad uses the heart as a symbol for the entire continent of Africa. The heart is also used to show what the heart of mankind truly is. Another use of the heart is as a representation of the inner station‚ which shows the darkness of exploitations through Kurtz. The different uses of the heart are amplified through such literary devices as irony‚ imagery‚ and
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The Shifting Heart Essay The Shifting heart is set in 1956 in the working class suburb of Collingwood‚ Melbourne. The play addresses racism treatment towards immigrants in post war Australia. Refugees were given jobs as labourers. The play is written as a response to the violent death of a polish immigrant‚ who violently took his own life at Christmas. The play itself is also set on
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CONTENTS Introduction 2 – 3 What Is a Firewall? 3 – 4 Types of Attack 4 - 5 Firewall Technologies 5 – 6 Choosing a Firewall 7 – 8 Conclusion 8 – 9 Abstract The world is surging towards a digital revolution where computer networks mediate every aspect of modern life. Not many years ago‚ most computers were carefully guarded mainframes‚ held tightly in the hands of skilled professionals. The systems and their guardians combined to provide ironclad
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walled tubes forming part if the circulation system by which blood is conveyed from the heart to all the parts of the body 4. Bundle of His Collection of heart muscles specialized for electrical conduction 5. Capillaries Any of the fine branching blood vessels that form a network between the arterioles and venules Heart vocabulary: Inferior vena cava A large vein carrying deoxygenated blood into the heart from the lower body Left atrium Receives oxygenated blood from the pulmonary veins
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Living in the Shadow of Heart Disease In the United States‚ every year more than 1 million Americans suffer from a heart attack. This number although it may not seem like a lot‚ is indeed quite high. Heart disease is a major killer that can in fact be controlled. If more people would watch what they eat‚ do simple exercises‚ and restrict physically damaging activities‚ such as smoking‚ they could lower their risk of a heart attack or heart disease. Many people do things that short term‚ have little
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The Visions of Light Vs Darkness When Joseph Conrad composed Heart of Darkness he created a literary masterpiece which embodied the essence of light contrasting with darkness. Throughout the novel Conrad constantly utilizes the images of light and dark and uses them to mold a vision‚ which the reader is then able to use to decipher the literal and metaphorical meanings of the novel. As Conrad said‚ " my task which I am trying to achieve is‚ by the power of the written word to make you hear‚ to
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