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MEDI 90 Ch. 11 > Book Vocab > Flashcards

Book Vocab Flashcards

1
Q

aorta

A

Largest artery in the body.

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2
Q

apex of the heart

A

Lower tip of the heart.

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3
Q

arteriole

A

Small artery.

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4
Q

artery

A

Largest type of blood vessel; carries blood away from the heart to all parts of the body. Notice that artery and away begin with an “a.”

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5
Q

atrioventricular bundle (bundle of His)

A

Specialized muscle fibers connecting the atria with the ventricles an transmitting electrical impulses between them. His is pronounced “hiss.”

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6
Q

atrioventricular node (AV node)

A

Specialized tissue in the wall between the atria. Electrical impulses pass from the pacemaker (SA node) through the AV node and the atrioventricular bundle or bundle of His toward the ventricles.

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7
Q

atrium (plural: atria)

A

One of two upper chambers of the heart.

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8
Q

capillary

A

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

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9
Q

carbon dioxide (CO2)

A

Gas (waste) released by body cells, transported via veins to the heart, and hen to the lungs for exhalation.

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10
Q

coronary arteries

A

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

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11
Q

deoxygenated blood

A

Blood that is oxygen poor.

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12
Q

diastole

A

Relaxation phase of the heartbeat.

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13
Q

electrocardiogram

A

Record of the electricity flowing through the heart. The electricity is represented by waves or deflections called P, QRS, or T.

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14
Q

endocardium

A

Inner lining of the heart.

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15
Q

endothelium

A

Innermost lining of blood vessels.

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16
Q

mitral valve

A

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

17
Q

murmur

A

Abnormal swishing sound caused by improper closure of the heart valves.

18
Q

myocardium

A

Muscular, middle layer of the heart.

19
Q

normal sinus rhythm

A

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

20
Q

oxygen

A

Gas that enters the blood through the lungs and travels to the heart to be pumped via arteries to all body cells.

21
Q

pacemaker (sinoatrial node)

A

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

22
Q

pericardium

A

Double-layered membrane surrounding the heart.

23
Q

pulmonary artery

A

Artery carrying oxygen-poor blood from the heart to the lungs.

24
Q

pulmonary circulation

A

Flow of blood from the heart to the lungs and back to the heart.

25
Q

pulmonary valve

A

Valve positioned between the right ventricle and the pulmonary artery.

26
Q

pulmonary vein

A

One of two pairs of vessels carrying oxygenated blood from the lungs to the left atrium of the heart.

27
Q

pulse

A

Beat of the heart as felt through the walls of the arteries.

28
Q

septum (plural: septa)

A

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

29
Q

sinoatrial node (SA node)

A

Pacemaker of the heart.

30
Q

sphygmomanometer

A

Instrument to measure blood pressure.

31
Q

systemic circulation

A

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

32
Q

systole

A

Contraction phase of the heartbeat.

33
Q

tricuspid valve

A

Located between the right atrium and the right ventricle; it has three (tri-) leaflet, or cusps.

34
Q

valve

A

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

35
Q

vena cava (plural: venae cavae)

A

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

36
Q

ventricle

A

One of two lower chambers of the heart.

37
Q

venule

A

Small vein.

MEDI 90 Ch. 11 (2 decks)

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