Valves
Route of Blood
Layers
Vocabulary
Do You Feel Lucky?
100
What valve lies between the right atrium and the right ventricle?
Tricuspid
100
What vessel takes blood from the lungs back to the left side of the heart?
pulmonary vein
100
What is the name of the tough sac that surrounds the heart?
pericardial sac
100
What is an embolus?
A moving blood clot
100
What is the purpose of the fluid in the pericardial space?
to prevent friction
200
What are the two names of the valve between the left atrium and left ventricle?
Mitral or bicuspid valve
200
Where does the blood go when it leaves the right side of the heart?
to the lungs
200
What is the name of the middle layer of the heart?
myocardium
200
What does peri- mean?
surrounding
200
What other structures help ensure blood return from the veins?
muscles
300
What is the role of valves in the circulatory system?
To keep blood flowing the right way
300
What is the name of the smallest blood vessels - where exchange of oxygen and nutrients actually takes place?
capillaries
300
What is the name of the outermost layer of the heart?
Epicardium
300
What does myo- mean?
muscle
300
How does the heart muscle get oxygen and nutrients?
Coronary arteries
400
What is the name of the vessel between the left ventricle and the aorta?
aortic valve
400
What three vessels empty into the right atrium?
coronary sinus inferior vena cava superior vena cava
400
What is the name of the innermost layer of the heart?
endocardium
400
What does the word "lumen" mean?
channel within an organ or vessel
400
What heart dysrrhythmia is treated with electrical shock?
Ventricular fibrillation
500
What is the purpose of the chordae tendineae?
To keep cusps of valves from flapping back
500
Where does the blood from the coronary arteries return to the heart so it can join the oxygenated blood from the body?
coronary sinus in right atrium
500
Which of the layers of the heart is thickest?
myocardium
500
What is the proper name of an area of tissue that dies when a blood clot lodges in a vessel?
Infarction
500
Why is a fast heart rate harmful to a diseased or weak heart?
Rest period is shortened and that is the only time the coronary arteries get blood
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