heart facts
heart beat
heart fuctionation
vains and blood
lungs and oxygen
100

why does the human need a heart

For the human body to have a right amount of blood


100
how much heart beats does a new born baby have per minute

70 to 190

100

what makes you heart beat

the cardiac conduction system

100

what are the things blood travel threw

the vains



100

what does the lungs need from the heart to function

Blood

300

what is the pulmonary system 

it is a loop from the heart back again

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