問題一覧
1
location of the heart
mediastinum
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four chambered pump with two atria and two ventricles
heart
3
junction of the right atrium and right ventricle
groove
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two vessels that also return blood to the right atrium
superior and inferior vena cana
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carry blood from the lungs to left atrium
right ventricle
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encases the heart and protect it from trauma and infection
pericardium
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outermost layer of the heart
epicardium
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middle layer of the heart
myocardium
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inner layer of the heart wall
endocardium
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tough outer connective tissue shealt encloses the heart
fibrous pericardium
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the inner lining of the fibrous pericardium
parietal pericardium
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deep parietal pericardium
pericardial cavity
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layer closest the heart
serous pericardium
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deoxygenated blood from superior and inferior vena cava
right atrium
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received blood from the right atrium then pumps it to the heart via pulmonary artery
right ventricle
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received oxygenated blood from the lungs via the 4 pulmonary veins
left atrium
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largest chambers pumps oxygenated blood to the aorta
left ventricle
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they open when the ventricle relaxes
atrioventicular valve
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forms a wall between the two ventricular chambers
interventicular septum
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a thin oval depression in the atrial wall
fossa ovalis
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fossa ovale in fetal heart
foramen ovale
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prevent the return flow of blood from right ventricle to right atrium
tricuspid valve
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thin,tough thread like corde
chordae tendinae
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small extension pf the right ventricle wall
trabeculaecarneae
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appers as three small cusps the right ventricle and pumlonary trunk
pulmonary semilunar valve
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carry oxygenated blood from the lungs into left atrium
pulmonary veins
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two large cusps between left atrium and left ventricle
mitral valve
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prevents the flow of blood the aorta into the left ventricle
aortic semilunar valves
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know as pacemaker of the heart
sinoatrial node
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intrinsic rate of 40-60 bpm
antrigenticular node
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from medulla oblongata
parasympathetic
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nervous system secretes norepinephrine increase force of contraction
sympathetic
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cardiac control maintains balance between the two
medulla oblongata
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specialized muscle fibers in the septum
atrioventricular bundle
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contraction of the heart muscle
systole