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Chpt 11 Cardio Syst2

Vocab

TermDefinition
aorta largest artery in the body
apex of the heart lower tip of the heart
arteriole small artery
artery Largest type of blood vessel, carries blood away from the heart to all parts of the body
atrioventricular bundle (bundle of His) Specialized muscle fibers connecting the atria with the ventricles and transmitting electrical impulses between them
atrioventricular node (AV node) Specialized tissue in the wall between the atria. Electrical impulses -> SA node -> AV node -> bundle of His
atrium (plural: atria) one of two upper chambers of the heart
capillary smallest blood vessel
carbon dioxide (CO2) gas (waste) released by body cells, transported via veins to the heart, and then to the lungs for exhalation
coronary arteries blood vessels that branch from the aorta and carry oxygen-rich blood to the heart muscle
deoxygenated blood blood that is oxygen-poor
diastole relaxation phase of the heart beat
electrocardiogram record of the electricity flowing through the heart
endocardium inner lining of the heart
endothelium innermost lining of blood vessels
mitral valve valve between the left atrium and the left ventricle; bicuspid valve
murmur abnormal swishing sound caused by improper closure of the heart valves
myocardium muscular middle layer of the heart
normal sinus rhythm heart rhythm originating in the sinoatrial node with a rate in patients at rest of 60 to 100 beast per minute
oxygen gas that enters the blood through the lungs and travels to the heart to be pumped via arteries to all body cells
pacemaker (sinoatrial node) Specialized nervous tissue in the right atrium that begins the heartbeat
pericardium double-layered membrane surrounding the heart
pulmonary artery artery carrying oxygen-poor blood from the heart to the lungs
pulmonary circulation flow of blood from the heart to the lungs and back to the heart
pulmonary valve valve positioned between the right ventricle and the pulmonary artery
pulmonary vein one of two pairs of vessels carrying oxygenated blood from the lungs to the left atrium of the heart
pulse beat of the heart as felt through the walls of the arteries
septum (plural: septa) partition or wall dividing a cavity; between the right and left atria & right and left ventricles
sinoatrial node (SA node) pacemaker of the heart
sphygmomanometer instrument to measure blood pressure
systemic circulation flow of blood from body tissue to the heart and then from the heart back tot he body tissues
systole contraction phase of the heartbeat
tricuspid valve located between the right atrium and the right ventricle; has three leaflets, or cusps
valve structure in veins or in the heart that temporarily closes an opening so that blood flows in only one direction
vein thin walled vessel that carries blood from body tissues and lungs back to the heart. Veins contain valves to prevent backflow of blood.
vena cava (plural venae cavae) largest vein int he body. The superior and inferior venae cavae return blood to the right atrium of the heart
ventricle one of two lower chambers of the heart
venule small vein
Created by: brittm1719
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