Question

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

Answer 1

The healthy heart is an amazingly robust organ. In particular it has a double layer of strong elastic muscle surrounding it which enables it to pump blood throughout the body without a high degree of fatigue setting in.

Answer 2

The correct answer for above statement is:

D. It consists of cardiac muscle tissues, which means it moves involuntarily.

Explanation:

The human body consists of 3 kinds of muscles, skeletal, smooth and internal organ.All muscles need a gradual provide of blood to supply them with fuel (oxygen and nutrients), and this can be very true of the tireless heart that consumes large amounts of energy. Even once resting, the center consumes twenty times a lot of oxygen than a resting skeletal muscle have.