Editing Muscle cell (section)

===Cardiac muscle cells===
{{Main|Cardiac muscle}}
The cell membrane of a [[cardiac muscle cell]] has several specialized regions, which may include the [[intercalated disc]], and [[transverse tubule]]s. The cell membrane is covered by a lamina coat which is approximately 50&nbsp; nm wide. The laminar coat is separable into two layers; the [[lamina densa]] and [[lamina lucida]]. In between these two layers can be several different types of ions, including [[calcium]].<ref name=ferrari>{{cite web|last1=Ferrari|first1=Roberto|title=Healthy versus sick myocytes: metabolism, structure and function|url=http://eurheartjsupp.oxfordjournals.org/content/ehjsupp/4/suppl_G/G1.full.pdf|website=oxfordjournals.org/en|publisher=Oxford University Press|access-date=12 February 2015|url-status=dead|archive-url=https://web.archive.org/web/20150219100248/http://eurheartjsupp.oxfordjournals.org/content/ehjsupp/4/suppl_G/G1.full.pdf|archive-date=19 February 2015}}</ref>

Cardiac muscle like the skeletal muscle is also striated and the cells contain myofibrils, myofilaments, and sarcomeres as the skeletal muscle cell.
The cell membrane is anchored to the cell's [[cytoskeleton]] by anchor fibers that are approximately 10&nbsp; nm wide.  These are generally located at the Z lines so that they form grooves and transverse tubules emanate. In cardiac myocytes, this forms a scalloped surface.<ref name=ferrari />

The cytoskeleton is what the rest of the cell builds off of and has two primary purposes; the first is to stabilize the topography of the intracellular components and the second is to help control the size and shape of the cell. While the first function is important for biochemical processes, the latter is crucial in defining the surface-to-volume ratio of the cell. This heavily influences the potential electrical properties of [[excitable cell]]s. Additionally, deviation from the standard shape and size of the cell can have a negative prognostic impact.<ref name=ferrari />