A myocardial infarction (2) has occurred with blockage of a branch of the left coronary artery (1). Myocardial infarction (MI), commonly known as a heart attack, occurs when blood flow decreases or stops to a part of the heart, causing damage to the heart muscle.
. A heart attack occurs when the blood supply to part of the heart stops and thus causes a section of the heart muscle to begin to die; whereas a cardiac arrest occurs when the heart stops beating as a whole.
I’m not sure but I think it’s B
1. chemicals your brain releases when you exercise.
2. using your heart, lungs and blood vessels
3. the ability to last a long time without tiring
4.using your muscles
5.using oxygen
