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Vocab. Review for Heart & Circulatory System

Vocabulary WordDefinition
atria 2 upper chambers of the heart
ventricle 2 lower chambers of the heart
pulmonary circulation flow of blood through the heart to the lungs & back to the heart
systemic circulation most extensive part of circulatory system in which blood moves to & from all body organs & tissues except the heart & lungs
coronary circulation flow of blood to tissues of the heart
artery blood vessel with thick elastic wall made of smooth muscle that moves blood AWAY from the heart
vein blood vessel that moves blood TO heart & has valves to prevent backwar movement of blood
capillary microscopic blood vessel that connects arteries & veins; nutrients, oxygen, wast materials & CO2 diffuse through its walls
blood pressure force exerted on vessel walls by blood when heart pumps it through the cardiovascular system
atherosclerosis cardiovascular condition resulting from fatty deposits on arterial walls
hypertension cardiovascular disorder; high blood pressure that can be caused by atherosclerosis
plasma liquid part of blood, consisting mostly of water plus dissolved nutrients, minerals & oxygen; makes up more than 1/2 the volume of blood
hemoglobin chemical in red blood cells that can carry oxygen & CO2
platelet irregularly shaped cell fragment that cirulates with red & white blood cells & helps to clot blood
lymphatic system collects fluid from body tissue spaces & returns it to the blood thru lymph capillaries & lymph vessels; plays a vital role in protecting against infection
lymph tissue fluid that has moved from around cells & into lymph vessels
lymphocyte type of white blood cell produced by the lymphatic system that fights infections & foreign materials
lymph nodes bean-shaped structures found throughout the body that filter out microorganisms
Created by: rboatman