Development of the heart October -08 -12 TUBE FORMATION • 15 days after conception ○ Begins as flat sheet of mesodermal cells (cells of the mesoderm layer in an embryo) • Day 18-20 ○ The cells form a horse -shoe shape (cardiogenic region) ○ Angiogenic cell clusters coalesce to form right and left endocardial tubes • Day 21 ○ Two endocardial tubes are completely fused • Day 22 ○ Heart begins beating • Day 23 ○ Heart tube forms constrictions prior to looping The first indication of
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Cardiovascular The cardiovascular system is consists of the heart and network of arteries‚ veins‚ and capillaries that transport blood throughout the body. There are two primary circulatory loops in the human body: the pulmonary circulation loop and the systemic circulation loop. The heart is a muscular organ about the size of a closed fist that functions as the body’s circulatory pump. It takes in deoxygenated blood through the veins and delivers it to the lungs for oxygenation before pumping it
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Running Head: CARIOVASCULAR SYSTEM Cardiovascular System BSC1011 Advanced Biology Tuesday‚ January 17‚ 2012 Cardiovascular System The heart weighs 300 grams and is shaped like a grapefruit and has two atria‚ two ventricles‚ and four valves receive blood from both venae cavae and the four pulmonary veins‚ and throw it into the aorta and pulmonary trunk. The heart pumps blood to 9 liters per day‚ making from 60 to 160 beats per minute. The heart is covered with
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MEDICAL SURGICAL NURSING MEDICAL SURGICAL NURSING RESPIRATORY SYSTEM: List 4 common symptoms of pneumonia the Tachypnea‚ fever with chills‚ productive cough‚ nurse might note on a physical exam. bronchial breath sounds. State 4 nursing interventions for assisting Deep breathing‚ fluid intake increased to 3 liters/ the client to cough productively. day‚ use humidity to loosen secretions‚ suction airway to stimulate coughing. What symptoms of pneumonia might the nurse expect to see
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1. Introduction to STD’s What is a disease? It is an abnormal condition in which the body of an organism is affected. Many diseases have come about by many factors; however‚ they can be divided into four main groups. They are pathogenic‚ deficiency‚ hereditary‚ and physiological. In this presentation‚ we’ll be looking at certain diseases which are pathogenic. In this category‚ microscopic organisms called pathogens‚ which are viruses‚ bacteria‚ fungi‚ protozoa and worms‚ are the ones that cause
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The human heart is slightly bigger than the size of ones fist. It is situated at a very safe place which is between the cage bones‚ i.e.‚ in the center of the chest. Usually it is slightly on the left side of the chest but in rare cases‚ it can be found on the right side. Heart is responsible for the blood flow to every single part of the body by constant contraction and relaxation of cardiac muscles. This is the reason why we hear rhythmic beats all the time. Heart pumps the pure blood to the different
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These embrace carotid endarterectomy (elimination of plaque and widening of the carotid artery) and angioplasty. Hemorrhagic stroke is treated differently than ischmic stroke. Surgical approaches used to treat this stroke variant include aneurysm clipping‚ aneurysm embolization and arteriovenous malformation (AVM)
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toprofound acute bilateral lower extremity ischemia (blue toe syndrome).(Wingo et al‚ 1986) In contrast‚ occurs when atheroscleroticdebris breaks free from an aortic or iliac plaque andembolizes to the distal vessels. Wire manipulation duringcoronary or peripheral angiographic procedures or surgicalcross-clamping across a calcific aortic plaque can trigger suchemboli. The terminal targets of the microembolic particlescomposed of cholesterol
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differences of blood pressure 1. Valves open in response to ______________________________________ on their two sides. 2. List the chambers/vessels that the four valves connect: Chamber Right ventricle Left ventricle Valve Pulmonary semilunar Aortic semilunar Chamber/Vessel Pulmonary trunk Aorta Left atrium Mitral Left ventricle Right atrium Tricuspid Right ventricle mid to late diastole 3. a. Ventricular filling occurs during ________________________ ventricular ________________
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U 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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