Cardiac tissue consists of slow-twitch fibers and is uniform in its characteristics.

“if you can contrast this to cardiac tissue so cardiac tissue is actually quite interesting because it is what we call the ultimate slow twitch fiber and so all the cardiac tisue is slow twitch in fact the slow twitch are even more slow twitch than skeletal and they're tend to be fairly uniform so you could give specific numbers on cross-sectional area a diameter length on those”