So this is the first important difference between cardiac muscle cells and skeletal muscle cells. Now the cytoplasm of our cardiac muscle cell is known as the sarcoplasm. So what about some other differences between cardiac muscle cells and skeletal muscle cells? So, so far we see many of the different structures that are found in skeletal muscles are also found in cardiac muscle cells. Now the next important difference between our cardiac muscle cell and the skeletal muscle cell is the fact that cardiac muscle cells are actually connected to one another. So if we have one cardiac muscle cell, a second cardiac muscle cell will be found right next to it and these two will be connected by regions called intercollated discs.