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Chapter 11 Quiz 2 Cardiovascular System
Quiz 2 Terms
29
Anatomy
11th Grade
02/14/2012

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Term
atrioventricular valves
Definition
(AV valves) located between the atrial and ventrical chambers on each side; prevents backflow into the atria when the ventricals contract
Term
bicuspid
Definition
aka-mitral valve-left AV valve; consists of 2 flaps endocardium
Term
tricuspid
Definition
right AV valve, has 3 flaps
Term
chordae tendineae
Definition
tiny white cords that anchor the flaps to the walls of ventricle
Term
semilunar valves
Definition
pulmonary and aortic semilunar valves; guards the bases of the 2 large arteries leaving the ventricular chambers; prevents arterial blood from re-entering the heart
Term
endocarditis
Definition
bacterial infection of the endocardium
Term
right coronary artery
Definition
Supplies oxygenated blood to the walls of the ventricles and the right atrium.
Term
left coronary artery
Definition
Directs oxygenated blood to the left anterior descending artery and the left circumflex.
Term
coronary sinus
Definition
The coronary sinus is a collection of veins joined together to form a large vessel that collects blood from the myocardium of the heart. It is present in all mammals, including humans. It delivers deoxygenated blood to the Right atrium in conjunction with the superior and inferior vena cava.
Term
angina pectoris
Definition
crushing chest pain
Term
infarct
Definition
a region of dead, deteriorating tissue resulting from a lack of blood supply
Term
myocardial infacrction
Definition
heart attack or coronary
Term
intrinsic conduction system
Definition
aka nodal system- a system built into the heart tissue that sets basic rhythm; composed of a special tissue that is nowhere else in the body; causes heart muscle depolarization in only one direction; from the atria to the ventricles; enforces75 beats per minute
Term
components of the intrinsic conduction system
Definition
sinoatrial node-located in the right atrium atrioventricular node-located at the junction of the atria and ventricles atrioventricular bundle right and left bundle branches- located -interventricular septum
Term
depolarization
Definition
the loss of a state of polarity; the loss of a negative charge inside the plasma membrane
Term
Aortic Semilunar Valves
Definition

The aortic semilunar valve is located between the left ventricle and the aorta.

 

 

 

The aortic semilunar valve also has three flaps (cusps). Once the left ventricle contracts the aortic valve is opened, allowing the oxygenated blood to pour into the aorta. Like the other semilunar valve, the aortic valve only allows the blood to flow in one direction.

 

Term
Cardiac Veins
Definition
any of the veins returning the blood from the tissues of the heart that open into the right atrium either directly or through the coronary sinus
Term
P Wave
Definition
a deflection in the electrocardiogram produced by excitation of the atria.
Term
Pulmonary semilunar valve
Definition
The pulmonary valve (sometimes referred to as the pulmonic valve) is the semilunar valve of the heart that lies between the right ventricle and the pulmonary artery and has three cusps.
Term
T Wave
Definition
the second major deflection of the normal surface electrocardiogram, reflecting the potential variations occurring with repolarization of the ventricles
Term
Bradycardia
Definition
low heart rate; less than 60 beats per minute
Term
Cardiac Cycle
Definition
refers to the events of one complete heartbeat; length of a cardiac sycle is 0.8 seconds
Term
Diastole
Definition
The normal rhythmically occurring relaxation and dilatation(enlarging) of the heart chambers, especially the ventricles, during which they fill with blood.
Term
Fibrillation
Definition
a rapid, uncoordinated shuddering of the heart muscles (looks like a bag of worms); makes the heart totally useless; causes death from heart attacks
Term
Heart Block
Definition
impaired transmission of impulses from the atrium to the ventricle
Term
Ischemia
Definition
lack of adequate blood supply to the heart muscle
Term
Murmurs
Definition
abnormal or unusual heart sounds
Term
Systole
Definition
contraction of the ventricles
Term
Tachycardia
Definition
rapid heart rate over 100 beats per minute
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