Select the correct answer.

Why does your heart never tire of constantly beating to pump blood throughout your body?

"It consists of cardiac muscle tissues, which means it moves involuntarily" therefore heart never tire of constantly beating to pump blood throughout one's body.

Explanation:

The heart is called the muscular organ which pumps blood through the blood vessels present in the circulatory system in various animals and humans. The cardiac muscle resists fatigue so well, because it has more mitochondria or energy store than the muscle of the skeleton.

It also has a constant blood supply for bringing to it oxygen and nutrients. Heart beats 72 beats in one minute. The heart may hike its beats during exercise and when decreases when keep heart in rest called as normal and good for the heart's health.