The cell is interstitial. Description The interstitial cell is a heterogeneous structure between muscle cells, which has many forms and is present in almost all tissues, organs and systems of the human body. The peculiarity of the cytoplasm of interstitial cells is that it consists of densely located pillars that do not have contact with each other and do not intersect. This cell is integral to the diffusion of electrolyte ions and substances, so this type of cellular structure leads to their rapid distribution throughout the body.