Hi everyone, I am actually very new to biology and unable to understand some of the things. My question is that, if our heart is working because of the blood it pumps, I mean that our heart needs blood for pumping all the time and if it dont get the blood then it may stop working !! So, how the brain is working ? ! I first related its working to blood and oxygen, but then I realized that there might be something different about our brain. Any ideas ? !