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53 terms

Ch. 20: The Heart

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pericardial cavity
where the heart is located
cardiology
the study of the normal heart and diseases associated with it
vertebral column/ sternum
the two structures the heart lies between
pericardium
a double-walled sac enclosing the heart
fibrous pericardium
loose fitting superficial part of the sac enclosing the heart
protects/ anchors/ prevents overfilling
functions of the fibrous pericardium
serous pericardium
deep to the fibrous pericardium
serous
a thin, slippery, two layer pericardium
parietal/ visceral
the two layers of the serous membrane
parietal
outer layer of the serous pericardium
visceral
layer that lines the external heart surface
pericardial cavity
space located between the two layers of the serous pericardium
pericardial fluid
helps reduce friction as the heart moves within the pericardial sac
epicardium/ myocardium/ endocardium
layers of the heart wall
endocardium
layer of the heart with smooth lining for chambers of heart, valves and continuous with lining of large blood vessels
interacial septum
seperates the two atria
interventricular septum
seperates the two ventricles
septum
a solid structure that separates two cavities
coronary sulcus
encircles the junction of the atria and ventricles
sulci
grooves on surface of heart
blood vessels/ fat
the sulci includes these
anterior interventricular sulcus
marks the anterior position of the septum separating the right and left ventricles
right
side of the ventricle that pumps blood into the lungs
left
side of the ventricle that pumps blood throughout the body
atria
two upper chambers of the heart
atria
have thin walls and receive blood returning to the heart
auricles
small earlike projections in the atria
auricles
extend anteriorly from the atria and help to increase atrial volume
fossa ovalis
a shallow depression on the interatial septum
fossa ovale
cavity that existed on the interatial septum in the fetal heart
reservoir
function of the atria
superior vena cava/ inferior vena cava/ coronary sinus
major openings of the right atrium
superior vena cava
returns blood from regions superior to the diaphragm
inferior vena cava
returns blood from regions below the diaphragm
coronary sinus
returns blood from the myocardium of the heart
tricuspid valve
where blood flows through into the right ventricle
left atrium
forms most of the base of the heart
bicuspid/ mitral/ left atrioventricular valve
where blood passes through into the left ventricle
ventricles
two lower chambers of the heart
right ventricle
forms most of the hearts anterior surface
left ventricle
forms most of the hearts posterior surface
ventricles
the major pumping chambers of the heart
pulmonary trunk
routes the blood to the lungs
pulmonary circulation carnae
another name for the lungs
papillary muscles
are cone shaped trabeculae carnae
trabeculae carnae
raised bundles of cardiac muscle
chordae tendineae
cords between valve cusps and papillary muscles
pulmonary semilunar valve
where blood flows into the pulmonary trunk
left ventricle
pumps blood into the aorta and then to the rest of the body
systemic circulation
the pumping of blood throughout the body
left ventricle
forms the apex of the heart
chordae tendineae
anchors bicuspid valve to papillary muscles
aortic semilunar valve
where blood passes through valve into the ascending aorta