the cardiac muscle we do need some cost him to go in from the outside kept since uses and yes it does have from years there are also other types of calcium channels okay some way it goes someone comes from here but there are other kinds as well and I don't going to break election the rhythm because that's a fairly complicated thing in a trigger the um usually those two types of channels of very closely associated so they're not physically collected and as in skeletal muscle but they're very close to each other so are the other types of channels they may be at a different part of the cell where they’re not connected with whether or not in close TestCore Pro association so the calcium that goes in as Act lion them and not just in collective system actually the whole action http://testcoreprouk.com/