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Download Britannica Illustrated Science Library Human Body II by Inc. Encyclopaedia Britannica PDF

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The mucus in the respiratory tract is expelled by the cilia. Bronchioles MUCUS NORMAL BRONCHIOLE Terminations located in the bronchi of each lung. Their function is key in the respiratory system: they connect with the alveoli, where the gaseous exchange takes place. If the bronchioles are damaged, natural breathing is impeded. GREATER QUANTITY OF MUCUS CONTRACTED BRONCHIOLE Lung Cancer ENLARGED MUCOUS GLAND The growth of cancer cells (pictured) is caused by tobacco in 90 percent of cases. Of the 4,000 chemical substances in tobacco, 40 components have a carcinogenic potential that causes the appearance of atypical cells.

Cirrhosis with dilation and risk of rupture, and confusion or changes in the level of consciousness (hepatic encephalopathy). Some symptoms are edema in the lower limbs, bloody vomit, jaundice (yellowish skin), generalized weakness, weight loss, and kidney disorders. This liver disease causes fibrosis and dysfunction of the liver. The main causes are chronic alcoholism and infection with the hepatitis C virus. Cirrhosis can cause a buildup of fluid in the abdomen (ascites), clotting disorders, increased blood pressure in the hepatic veins of the digestive tract, MUCOSA ACUTE ULCER 2 LIVER CAPILLARY DEEPENING Stomach CELLS WITH FAT A A FATTY LIVER can appear as a result of excessive alcohol consumption.

Each branch takes deoxygenated blood to the lungs. The pulmonary artery is the only artery that transports deoxygenated blood. When the blood pressure in the pulmonary artery increases, the walls thicken. The blood pumped by the heart is reduced. WIDENING VESSELS Chest pains could be a warning sign that the cardiac muscle is not receiving enough blood to keep up with the demands of the work it is doing. In pectoral angina, very strong chest pains occur because of the arteries that are obstructed by arteriosclerosis.

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