Chapter 11 reverse Flashcards
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Closed system of the heart and blood vessels
Heart pumps blood
Bolld vessels allow blood to circulate to all parts of the body
Cardiovascular System
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transport O2, nutrients, hormones, etc
temperature regulation
protection: immunity and hemostasis
Functions of the Cardiovascular system
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locatoin: thorax between the lungs in the inferior mediastium
orientation: pointed apex directed toward the left hip
base points toward right shoulder
about size of fist
Heart
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Pericardium: double walled sac
fibrous pericardium is loose and superficial
Serous membrane: deep to the fibrous pericardium and composed of 2 layers
Heart coverings
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Visceral pericardium: surface of the heart
Parietal pericardium: outside layer that lines the inner surface of the fibrous pericardium
Selrous fluid: fills space between the layers of pericardium
Serous Membrane
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3 layers
epicardium
myocardium
endocardium
Heart wall
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visceral pericardium
outside layer superficial
Epicardium
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middle layer
mostly cardiac muscle
myocardium
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endothelium
inner layer: deep
endocardium
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4 chambers
right and left act as separate pumps
Atria: top
Ventricles: Bottom
Heart Chambers
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Left and right
upper chambers
receiving chambers
Atria
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right and left
lower chambers
pumps
Ventricles
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muscle that separates the two ventricles
Interventricular septum
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muscle wall that separates the two Atria
interatrial septum
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allow blood to flow in only one direction: prevent backflow
Atrioventricular Valves (AV)
Semilunar valves
Heart valves
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Tricuspid valves between RA and RV
Bicuspid (mitral) valve: between LA and LV
Atrioventricular Valves
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Pulmonary semilunar valve: between RV and pulmonary trunk
aortic valve: between LV and aorta
Semilunar valves
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Systemic Circuit
Pulmonary Circuit
Blood flow through body
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blood flows from the LV through body and back to the RA
Systemic Circuit
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blood flows from the RV to the lungs and back to the LA
PUlmonary Circuit