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Bio Heart & Circulat

Biology - Heart & Circulation 30.3, P. 917 - 920

QuestionAnswer
atriums two smaller chambers of the heart - where blood enters the heart
ventricles two larger chambers of the heart - where blood leaves the heart
valve flaps of tissue that prevent blood from flowing backward
pacemaker the sinoatrial (SA) node of the heart
artificial pacemaker can replace the SA node if it is damaged
purpose of SA node sends electrical signals to the muscle fibers of the atria
pump heart can be compared to this
heartbeat consists of two contractions - in atria and ventricles
pulmonary combines Latin roots pulmo (lung) and ary (belonging to or connected with)
left ventricle largest chamber of the heart - receives oxygen rich blood from the lungs & pumps it to the left ventricle & all parts of the body
right atrium receives oxygen poor blood from the body and pumps it to the right ventricle
right ventricle pumps oxygen blood to the longs
pulmonary circulation circulation between the heart and lungs
systemic circulation circulation between the heart and rest of the body
Created by: tobiashersey
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