Question

Why is the heart not fatiguedeven through it beats non stop throughout the life of an individual

Answer 1

This is because the walls of the human heart are made of cardiac muscles. The specialty of the cardiac muscles is that they never get tired or exhausted in spite of pumping blood throughout the body continuously. The cardiac muscles are only found in the walls of the heart, no where else in the whole body. Hope you found this wee bit of information helpful.. :-)