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Bio Heart & Circulat
Biology - Heart & Circulation 30.3, P. 917 - 920
Question | Answer |
---|---|
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 |