It's an energy that is released by nuclear fission, decay and fussion. This generate enrergy
Skeletal muscle: multinucleated, striated; attached to bones producing locomotion, general support and posture; producing heat. Contraction is voluntary, and not long-sustained. b. Cardiac muscle: found only in the heart and responsible for contraction of cardiac tissue and distribution of blood.
I would say diabetes because when you're diabetic you have an elevated amount of glucose. Which causes the narrowing of blood vessels and stiffening in arteries and a decrease in the function of red blood cells. which would mean that white blood cells don't do their job, and fight infection. so with all of this, blood and oxygen flow to the wound are decreased. So the wound can not receive proper attention from the body because it doesn't have enough nutrients or oxygen to heal.