Peradeniya Functions of Blood * Blood is pumped by the heart through blood vessels‚ which extend throughout the body. * Blood helps to maintain homeostasis in several ways. 1. Transport of gases‚ nutrients‚ and waste products. * Oxygen enters blood in the lungs and is carried to cells. * Carbon dioxide‚ produced by cells‚ is carried in the blood to the lungs‚ from which it is expelled. * Ingested nutrients‚ ions‚ and water are transported by the blood from the digestive tract
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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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Which layer of the heart wall consists of cardiac muscle tissue? (Points : 1) Epicardium Pericardium Myocardium Endocardium Hypocardium 2. Which blood vessel shown in the figure carries oxygenated blood to the lower thoracic cavity and the abdominal cavity of the body? (Points : 1) A B E F H 3. Blood leaving the left ventricle passes through which of the following structures? (Points : 1) Right atrium
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Artificial Heart/ Heart Transplants A natural heart has two pumps‚ each has two chambers. The right atrium pumps oxygen-depleted blood from the body into the right ventricle. The right ventricle pumps blood to the lungs. The left atrium sends aerated blood from the lungs into the left ventricle‚ which pumps blood out of the body. With each heartbeat‚ the two atria contracts together‚ followed by the large ventricles. Congestive heart failure is when the heart fails to pump blood. Heart failure
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From The Heart By: ZainabNafiu Goal I have a goal to make everybody happy for the rest of their life My goal is working everyday Can someone help me to get them happier? If I had one wish it’s to know I found out what it is It’s really me and my happiness. Beautiful You are beautiful like a star You shine so bright in the dark Don’t go away please will you come back
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N I T III The Heart 9. Heart Muscle; The Heart as a Pump and Function of the Heart Valves 10. Rhythmical Excitation of the Heart 11. The Normal Electrocardiogram 12. Electrocardiographic Interpretation of Cardiac Muscle and Coronary Blood Flow Abnormalities: Vectorial Analysis 13. Cardiac Arrhythmias and Their Electrocardiographic Interpretation C H A P T E R 9 Heart Muscle; The Heart as a Pump and Function of the Heart Valves With this chapter we begin
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Heart disease‚ strokes and high blood pressure The heart: Our heart is a vital organ; it is a super muscle which constantly pumps our blood around our body at a rate of 40 to 100 beats per minute for a lifetime. It never tires. The heart has two sides which are separated and each side has two chambers. Valves make sure blood can only flow in one direction. The right side receives de-oxygenated blood from the body through the vena cava and pumps it through the pulmonary artery to the lungs‚ and the
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High or Low Blood Pressure? Purpose: The purpose of this experiment is to compare blood pressure as related to gender and athletic status. Hypothesis: I predict that males have a higher blood pressure than women and athletes have a higher blood pressure than non athletes Background Info: Blood pressure is the amount of force that blood pushes against the inside walls of blood vessels as it passes through. This pressure
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Blood Clots What are blood clots? Blood is a liquid that flows within blood vessels. It is constantly in motion as the heart pumps blood through arteries to the different organs and cells of the body. The blood is returned back to the heart by the veins. Veins are squeezed when muscles in the body contract and push the blood back to the heart. Blood clotting is an important mechanism to help the body repair injured blood vessels. Blood consists of: · red blood cells containing hemoglobin that
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Heart Questions: 1. What do you notice about the sizes of the four chambers? Annotate the measurements you have recorded onto your drawing. The ventricles are much bigger than the atria and the left ventricle is bigger than the right ventricle. Left atrium wall: 0.4cm Left ventricle wall: 1.4 cm Right atrium wall: 0.2 cm Right ventricle wall: 0.6 cm 2. The left ventricle has a much thinker wall than the right ventricle; explain why this is. The left ventricle has a much thicker wall
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