Question

What happen to the heart when muscles work harder ?

Answer 1

when muscle works harder, our heart beat increases as the muscle are to be supplied with blood so that we can continue our work. Thus, our heart beats faster to meet the demand of the muscles.


I HOPE THE ANSWER HELPED YOU!!!

Answer 2

⚡✔️ꃅꍟꋪꍟ  ꀤꌗ  ꌩꂦꀎꋪ  ꍏꈤꌗꅏꍟꋪ.... 

$<b>When muscles work harder they need more oxygen. So hearts begins to pump blood faster to overcome that need.$

$<marquee>ℍᝪℙℰ  ⅈᝨ  ℍℰℒℙՏ  ℽᝪႮ....$
✌❤✌