the heart

Cards (9)

what is the circulatory system made up of
heart , blood vessels , blood
what is a double circulatory system
where blood passes through the heart twice and has two separate circuits, one for oxygenated blood and one for deoxygenated blood.
where is deoxygenated blood pumped into  
the lungs
where is oxygenated blood pumped into  
around all other organs of the body
which ventricle pumps deoxygen blood into the lungs
the right ventricle
which ventricle pumps oxygenated blood around the body
the left ventricle
what are the walls of the heart made up of
muscle tissue
what do valves do in the heart  
prevents blood from flowing backwards
what controls resting heart rate  
group of cells in right atrium wall that act as a pacemaker