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Dr.Kaan Yücel yeditepeanatomyfhs121.wordpress.com Thoracic
Dr.Kaan Yücel yeditepeanatomyfhs121.wordpress.com Thoracic

... The thorax is the part of the body between the neck and abdomen. Posterior surface is formed by the 12 thoracic vertebræ and the posterior parts of the ribs. Anterior surface is formed by the sternum and costal cartilages. Lateral surfaces are formed by the ribs, separated from each other by the int ...
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... As a pump, the heart normally has an inflow pressure and there is an equal “back pressure” of blood in the great veins as they enter the right atrium. The jugular vein therefore acts like a manometer and indicates the filling pressure of the right side of the heart. If the heart fails and is unable ...
study guide unit 3
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... The abdominal aorta travels down the posterior wall of the abdomen, the abdominal aorta runs on the left of the inferior vena cava, giving off major blood vessels to the gut organs and kidneys. There are many recognized variants in the vasculature of the gastrointestinal system. The most common arra ...
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... Ant. Interventricular Artery, and pulmonary pleura (cardiac notch). What are the first arteries off the aorta, and when does blood flow through them? R/L Coronary arteries. Only during diastole. What veins of the heart DO NOT drain into the coronary sinus? Anterior Cardiac Veins (directly into RA), ...
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Heart



The heart is a muscular organ in humans and other animals, which pumps blood through the blood vessels of the circulatory system. Blood provides the body with oxygen and nutrients, and also assists in the removal of metabolic wastes. The heart is located in the middle compartment of the mediastinum in the chest.In humans, other mammals, and birds, the heart is divided into four chambers: upper left and right atria; and lower left and right ventricles. Commonly the right atrium and ventricle are referred together as the right heart and their left counterparts as the left heart. Fish in contrast have two chambers, an atrium and a ventricle, while reptiles have three chambers. In a healthy heart blood flows one way through the heart due to heart valves, which prevent backflow. The heart is enclosed in a protective sac, the pericardium, which also contains a small amount of fluid. The wall of the heart is made up of three layers: epicardium, myocardium, and endocardium.The heart pumps blood through both circulatory systems. Blood low in oxygen from the systemic circulation enters the right atrium from the superior and inferior vena cavae and passes to the right ventricle. From here it is pumped into the pulmonary circulation, through the lungs where it receives oxygen and gives off carbon dioxide. Oxygenated blood then returns to the left atrium, passes through the left ventricle and is pumped out through the aorta to the systemic circulation−where the oxygen is used and metabolized to carbon dioxide. In addition the blood carries nutrients from the liver and gastrointestinal tract to various organs of the body, while transporting waste to the liver and kidneys. Normally with each heartbeat the right ventricle pumps the same amount of blood into the lungs as the left ventricle pumps to the body. Veins transport blood to the heart and carry deoxygenated blood - except for the pulmonary and portal veins. Arteries transport blood away from the heart, and apart from the pulmonary artery hold oxygenated blood. Their increased distance from the heart cause veins to have lower pressures than arteries. The heart contracts at a resting rate close to 72 beats per minute. Exercise temporarily increases the rate, but lowers resting heart rate in the long term, and is good for heart health.Cardiovascular diseases (CVD) are the most common cause of death globally as of 2008, accounting for 30% of deaths. Of these more than three quarters follow coronary artery disease and stroke. Risk factors include: smoking, being overweight, little exercise, high cholesterol, high blood pressure, and poorly controlled diabetes, among others. Diagnosis of CVD is often done by listening to the heart-sounds with a stethoscope, ECG or by ultrasound. Specialists who focus on diseases of the heart are called cardiologists, although many specialties of medicine may be involved in treatment.
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