What is special about the tissue present in the heart?

(N/A) The cardiac muscle tissue present in the heart has the following special characteristics:
$(1)$ Cardiac muscle fibers are involuntary,meaning they do not function according to our will.
$(2)$ These muscles are fatigue-resistant and exhibit rhythmicity.
$(3)$ They have a rich blood supply.
$(4)$ They are myogenic,meaning they can generate their own electrical impulses for contraction even when removed from the body. They possess properties of both muscle and nerve tissue.