Chapter 11 Vocabulary Flashcards Preview

Medical Terminology > Chapter 11 Vocabulary > Flashcards

Flashcards in Chapter 11 Vocabulary Deck (33):
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Apex of the heart

Lower tip of the heart

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Atrioventricular bundle

Specialized muscle fibers connecting the atria with the ventricles and transmitting electrical impulses between them

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Aorta

Largest artery in the body

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Artery

Largest type of blood vessel; carries blood away from the heart to all parts of the body

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Atrium

One of two upper chambers of the heart

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Arteriole

Small artery

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Capillary

Smallest blood vessel. Materials pass to and from the bloodstream through the thin capillary walls

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Carbon dioxide

Gas (waste) released by blood cells, transported via veins to the heart, and then to the lungs for exhalation

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Coronary arterties

blood vessels that branch from the aorta and carry oxygen-rich blood to the heart muscle

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Diastole

relaxation phase of the heartbeat

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Endocardium

inner lining of the heart

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Endothelium

innermost lining of blood vessels

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Mitral Valve

valve between the left atrium and the left ventricle; bicuspid valve

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Murmur

abnormal swishing sound caused by improper closure of the heart valves

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Myocardium

Muscular, middle layer of the heart

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Normal sinus rhythm

Heart rhythm originating in the sinoartrial node with a rate in patients at rest of 60 to 100 beats per minute

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Pacemaker (sinoatrial node)

specialized nervous tissue in the right atrium that begins the heartbeat. An artificial cardiac pacemaker is an electronic apparatus implanted in the best to stimulate heart muscle that is weak and not functioning

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Pericardium

Double-layered membrane surrounding the heart

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Pulmonary artery

artery carrying oxygen-poor blood from the heart to the lungs

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pulmonary circulation

flow of blood from the heart to the lungs and back to the heart

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Pulmonary valve

valve positioned between the right ventricle and the pulmonary artery

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Pulse

beat of the heart as felt through the walls of the arteries

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Septum

Partition or wall dividing a cavity; such as between the right and left artia (interatrial septum) and right and left ventricles (interventricular septum)

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Sinoatrial node (SA node)

pacemaker of the heart

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Sphygmomanometer

Instrument to measure blood pressure

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Systemic Circulation

Flow of blood from body tissue to the heart and then from the heart back to body tissues

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Systole

contraction phase of the heartbeat

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Tricuspid Valve

Located between the right atrium and the right ventricle; it has three leaflets or cusps

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Valve

structure in veins or in the heart that temporarily closes an opening so that blood flows in only one direction

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Vein

Thin-walled vessel that carries blood from body tissues and lungs back to the heart. veins contain valves to prevent back flow of blood

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Vena Cava

Largest vein in the body. The superior and inferior venae cavae return blood to the right atrium of the heart

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ventricle

one of two lower chambers of the heart

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venule

small vein