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Med.Term C.11 Vocab

Chabner, Language of Medicine 11th edition-Chapter 11 Vocabulary

VocabularyMeaning
Aorta The largest artery in the body
apex of the heart The lower tip of the heart
arteriole A small artery
artery The 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 atria; electrical impulses pass from pacemaker through AV node and bundle of His toward ventricles
atrium (plural: atria) One of two upper chambers of the heart
capillary The smallest blood vessel
carbon dioxide (CO2) Waste gas released by body cells, transported via veins to the heart, and then to lungs for exhalation
coronary arteries Blood vessels that branch from the aorta and carry oxygen-rich blood to the heart muscle
deoxygenated blood Oxygen-poor blood
diastole Relaxation phase of the heartbeat
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 left ventricle; bicuspid valve
murmur Abnormal swishing sound caused by improper closure of heart valves
myocardium Muscular, middle layer of the heart
normal sinus rhythm Heart rhythm originating in sinoatrial node with resting rate of 60-100 beats/min
oxygen Gas carried by the blood from the lungs 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 Carries oxygenated blood from the lungs to the left atrium of the heart
pulse The beat of the heart as felt through the walls of the arteries
septum (plural: septa) A partition or wall dividing a cavity, such as that between the right and left atria and right and left ventricles
sinoatrial node (SA node) The pacemaker of the heart
sphygmomanometer An instrument to measure blood pressure
systemic circulation Flow of blood from body tissue to the heart and back
systole The contraction phase of the heartbeat
tricuspid valve Located between the right atrium and right ventricle; has three leaflets or cusps
valve A structure in veins or in the heart that temporarily closes an opening so blood flows in only one direction
vein A thin-walled vessel that carries blood from body tissues and lungs back to the heart; contains valves to prevent the backflow of blood
vena cava (plural: venae cavae) The largest vein in the body; superior and inferior venae cavae return blood to the right atrium of heart
ventricle One of two lower chambers of the heart
venule A small vein
 



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