Friedman- Cardiovascular - Sheet1 Flashcards
Function
Transportation of: oxygen & carbon dioxide, nutrients, hormones, ions.
location of heart
thoracic cavity
Apex
creates the cardiac notch in the lungs; rests on the diaphragm (bottom)
base
broad superior port of the heart where the blood vessels leave/enter heart (top)
cardiac notch in lungs
only on left side; where apex rests
layers of heart
epicardium/pericardium, myocardium, endocardium
epicardium/pericardium
holds heart in place; double wall sac that surrounds the heart
myocardium
pumps the blood; cardiac muscle layer
endocardium
glossy tissue; inner layer that lines the heart chambers
Artery
blood LEAVES heart; aorta/pulmonary trunk branch to arteries
Vein
blood ENTERS heart; superior/inferior vanae cavea & right/left pulmonary veins
Atrium (atria) chambers
ENTRANCE from veins; superior portion of heart; not important for pumping blood
Ventricle chambers
EXIT out blood into circulation; inferior portion of heart; pumps heart (pulmonary & systemic)
side of heart with oxygen rich blood
left side
systemic circulation
(left) cycle of pumping oygen rich blood to the appropriate tissues of the body
Pulmonary circulation
(right) pumps blood to the lungs
left ventricle
high levels of myochondrium (very thick) > it can push blood through systemic circulation
Right Atrium
Received blood from superior and inferior venae cavae
Right Ventricles
Pumps blood into pulmonary trunk-branches to form pulmonary arteries for each lung
Left Atrium
Receives blood from pulmonary vein (rich in oxygen)
AV (atrioventricular valve)
between atria and ventricles-prevents backflow to atria when ventricles contract
Semilunar valves
guards the base of the two arteries
Cardiac cells
do not require nerve impulse to contract
contaction of heart uses
intrinsic conduction system/nodal system-sympathetic & parasympathertic nervous system
intrinsic conduction
system built into the heart-causes depolarization of the heart muscle
