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19 terms

Ch 21: The Cardiovascular System: The Heart (Internal Anatomy and Organization of the Heart)

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interatrial septum
separates the atria
interventricular septum
divide the ventricles
what is contained in the openings between the atria and ventricles?
folds of connective tissue covered by endocardium, these valves maintain a one-way flow of blood
superior and inferior vena cava
two great veins in the systemic circuit through which the right atrium receives blood
pectinate muscles
prominent muscle ridges in the atrial walls
coronary veins
return blood to the coronary sinus
foramen ovale
an opening that is formed during embryonic development and penetrates the interatrial septum
fossa ovalis
depression that is left after the foramen ovale closes after birth
where does blood leaving the right atrium flow?
into the right ventricle through the atrioventricular (AV) valve
contents of atrioventricular valve
three cusps of fibrous tissue braced by the tendinous chordae tendineae that are connected to papillary muscles
blood leaving right ventricle flows where?
into the pulmonary valve then enters the pulmonary trunk
divisions of pulmonary trunk form?
left and right pulmonary arteries
what supplies left atrium with oxygenated blood?
left and right pulmonary veins
where does blood leaving left atrium flow?
into the left ventricle through the left atrioventricular (AV) valve
another name for left atrioventricular valve
mitral or bicuspid valve
what is the largest and thickest of the four chambers? and why?
the left ventricle because it must pump blood to the entire body
what is the path of blood leaving the left ventricle?
passes through the aortic valve into the systemic circuit via the ascending aorta, through the aortic arch and into the descending aorta
what does the coronary sinus open into?
right atrium
what is another name for the right atrioventricular (AV) valve?
tricuspid valve