CW 104
Help!
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| The heart is composed of what two properties? | electrical and mechanical
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| The heart is able to perform what three functions via the blood vessels? | Transport oxygen and nutrients to organs and tissues
Distributing hormones
Transporting waste products
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| What are the four properties the heart must have? | Automaticity
Conductivity
Contractility
Excitability
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| Automaticity | can generate its own impulse
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| Conductivity | can transmit an impulse from one cell to the next
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| Contractility | ability to contract
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| Excitability | respond to an impulse
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| Where is the heart located? | BETWEEN the lungs in the THORACIC cavity
Positioned partially to the LEFT of the sternum
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| Name the layers of the heart. | Pericardium
Myocardium
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| Blood returns to the heart via which blood vessels... | superior and inferior vena cava
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| Blood enters which chamber after returning from the body? | right atrium
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| Blood passes from the right atrium to the right ventricle through which valve? | tricuspid valve
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| Where does the blood go after passing through the tricuspid valve? | right ventricle
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| Blood leaving the right ventricle passes through which valve? | pulmonary valve
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| What blood vessel does the blood enter after passing through the pulmonary valve? | pulmonary artery
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| When blood gets pumped from the right ventricle, what organ or tissue is the blood headed to? | the lungs
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| What vessel carries blood from the lungs to the heart? | pulmonary veins
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| What chamber does the blood return to coming from the lungs? | left atrium
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| Blood passes from the left atrium to the left ventricle through which valve? | bicuspid or mitral valve
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| Where does the blood go after passing through the bicuspid or mitral valve? | left ventricle
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| Blood leaving the left ventricle passes through which valve? | aortic valve
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| What blood vessel does the blood enter after passing through the aortic valve? | the aorta
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| The aorta carries blood to... | the body
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| What is the correct order of the conduction system? | SA node
internodal pathways and Bachmann's bundle
AV node
Bundle of His
R & L bundle branches
Purkinje fibers
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| SA node | where the electrical impulse of the heart originate
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| Which part of the conduction system tells the ventricles to contract? | Purkinje fibers
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| What are the coronary arteries? | arteries that carry blood to the heart muscle itself
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| What is an embolus? | a traveling blood clot
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| View of lead 1 | views L lateral side of heart
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| View of lead II | views inferior surface
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| View of lead III | views inferior surface
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| View of aVR | views R atrium
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| View of aVL | views L lateral side of heart
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| View of aVF | views inferior surface
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| View of V1 | views R bundle branch
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| View of V2 | views R anterior surface
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| View of V3 | views R anterior septal surface
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| View of V4 | views L anterior surface
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| View of V5 | views left ventricle
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| View of V6 | views lateral surface
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MrsReynolds
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