cardiovascular system: the heart Flashcards
(22 cards)
Does the right atrium receive deoxygenated or oxygenated blood ?
deoxygenated
The pulmonary veins bring blood to the _____ ?
left atrium
how many chambers does the heart have ?
four
which cavity is the heart in ?
thoratic cavity
where does the superior vena cava collect blood from ?
head, neck, thorax, and upper etremity
where does the inferior vena cava collect blood from ?
abdomen and lower etremity
where do pulmonary veins bring blood to ?
from the lungs to the left atrium
what is the superficial extension on the atrium called ?
the auricle
what do ventricles do ?
pump blood out of the heart
where does the right ventricle pump blood to ? and how ?
the lungs via the pulmonary trunk
where does the left ventricle pump blood to ?
the aorta then body cells
what divides the 2 ventricles ?
the interventricular septum
what is the double layered membrane that surrounds the heart ?
the pericardium or pericardial sac
what is the pericardial cavity filled with ?
a lubricating fluid
what happens when excessive fluid build up in the pericardial space?
it prevents pressure which means less blood will be ejected from the heart
what is the outermost layer of the heart ?
epicardium
what is the middle layer of the heart (and also thickest)?
the myocardium
in which ventricle are the muscles thicker ?
left
why is the left ventricle thicker than the right ?
the left needs a greater amount of pressure to pump the blood a farther distance
what is the innermost layer of the heart ?
endocardium
what is the oval shaped depression called in the adult heart caused by the foramen ovale ?
fossa ovalis
what is the foramen ovale ?
