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Chapter 26

BIOL 1010 Chapter 26: Topic 26.5

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University of Manitoba
Biological Sciences
BIOL 1010
Emily A.Mc Kinnon

OD88729 Bio 1010 Definitions Anemia: A condition in which an abnormally low amount of hemoglobin or a low number of red blood cells results in the body cells receiving too little oxygen. Aorta: An artery that conveys blood directly from the left ventricle of the heart to other arteries. Arteriole: A vessel that conveys blood between an artery and a capillary bed. Artery: A vessel that carries blood away from the heart to other parts of the body. Atherosclerosis: A cardiovascular disease in which fatty deposits called plaques develop on the inner walls of the arteries, narrowing their inner diameters. Atrioventricular (AV) Node: A region of specialized heart muscle tissue between the left and right atria where electrical impulses are delayed for about 0.1 second before spreading to both ventricles and causing them to contract. Atrium: (plural, atria) A heart chamber that receives blood from the veins. Blood: A type of connective tissue with a fluid matrix called plasma in which blood cells are suspended. Blood Pressure: The force that blood exerts against the walls of blood vessels. Capillary: A microscopic blood vessel that conveys blood between an arteriole and a venule; enables the exchange of nutrients and dissolved gases between the blood and interstitial fluid. Capillary Bed: One of the networks of capillaries that infiltrate every organ and tissue in the body. Cardiac Cycle: The alternating contractions and relaxations of the heart. Cardiac Output: The volume of blood pumped per minute by each ventricle of the heart. Cardiovascular Disease: Diseases of the heart and blood vessels. Cardiovascular System: A closed circulatory system with a heart and branching network of arteries, capillaries, and veins Circulatory System: The organ system that transports materials such as nutrients, O2, and hormones to body cells and transports CO2 and other wastes from body cells. Closed Circula
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